The foliage is fine and elegant. Elegant glänzende, schwarze Blätter. Black Knight becomes about 50 cm tall and wide and is hardy to -15 ºC. The foliage is fine and elegant. Plant Black Knight in the sun in an average soil that is well-drained. Black Knight has glossy, black foliage and red flowers in August-September. This gorgeous butterfly bush is very vigourous and produces deep-purple to almost black flowers. Stonecrop are tough perennials and a dependable choice for the late summer garden. It is an excellent Sedum for the rock garden but also for the perennial border or for in a pot on terrace or balcony. Black Knight has glossy, black foliage and red flowers in August-September. E-mail: Website: Penstemon Purple Perfection ('Pmoore14') PP27,315. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Black Knight has glossy, black foliage and red flowers in August-September. The foliage is fine and elegant. Pair with gold or. Plant Black Knight in the sun in an average soil that is well-drained. 150. Black Knight becomes about 50 cm tall and wide and is hardy to -15 ºC. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Plant Black Knight in the sun in an average soil that is well-drained. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. The foliage is fine and elegant. Black Knight has glossy, black foliage and red flowers in August-September. The foliage is fine and elegant. The foliage is fine and elegant. Plant Black Knight in the sun in an average soil that is well-drained. Plant Black Knight in the sun in an average soil that is well-drained. Black Knight has glossy, black foliage and red flowers in August-September. Plant Black Knight in the sun in an average soil that is well-drained. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. The foliage is fine and elegant. Black Knight has glossy, black foliage and red flowers in August-September. Plant Black Knight in the sun in an average soil that is well-drained. Plant Black Knight in the sun in an average soil that is well-drained. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Black Knight has glossy, black foliage and red flowers in August-September. The foliage is fine and elegant. It is an excellent Sedum for the rock garden but also for the perennial border or for in a pot on terrace or balcony. Plant Black Knight in the sun in an average soil that is well-drained. Black Knight has glossy, black foliage and red flowers in August-September. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. View all Varieties H-Z; Perennials by Size. Plant Black Knight in the sun in an average soil that is well-drained. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Key PointsSedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Black Knight has glossy, black foliage and red flowers in August-September. The foliage is fine and elegant. The foliage is fine and elegant. A clump-forming perennial to around 50cm tall and 40cm wide, with fleshy, purple-black leaves and producing terminal clusters of bright magenta pink flowers, in mid-to late summer. Plant Black Knight in the sun in an average soil that is well-drained. Plant Black Knight in the sun in an average soil that is well-drained. The foliage is fine and elegant. To grow well, it prefers sun and occasional - low water. Description. Stonecrop are tough perennials and a dependable choice for the late summer garden. Plant Black Knight in the sun in an average soil that is well-drained. Plant Black Knight in the sun in an average soil that is well-drained. The foliage is fine and elegant. The foliage is fine and elegant. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Black Knight has glossy, black foliage and red flowers in August-September. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Plant Black Knight in the sun in an average soil that is well-drained. Plant Black Knight in the sun in an average soil that is well-drained. Black Knight becomes about 50 cm tall and wide and is hardy to -15 ºC. Black Knight has glossy, black foliage and red flowers in August-September. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. It is an excellent Sedum for the rock garden but also for the perennial border or for in a pot on terrace or balcony. Plant Black Knight in the sun in an average soil that is well-drained. The foliage is fine and elegant. Black Knight has glossy, black foliage and red flowers in August-September. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Black Knight has glossy, black foliage and red flowers in August-September. The foliage is fine and elegant. Le Sedum Black Knight est un orpin touffu, compact et vigoureux, au feuillage d'un pourpre noir brillant très élégant et aux fleurs rouges en fin d'été. ”. : Constant feed with a balanced fertilizer (200-250 ppm N) that contains average levels. Key PointsSedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. The foliage is fine and elegant. Black Knight becomes about 50 cm tall and wide and is hardy to -15 ºC. Plant Black Knight in the sun in an average soil that is well-drained. Black Knight becomes about 50 cm tall and wide and is hardy to -15 ºC. The foliage is fine and elegant. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. The foliage is fine and elegant. Black Knight has glossy, black foliage and red flowers in August-September. It is an excellent Sedum for the rock garden but also for the perennial border or for in a pot on terrace or balcony. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Black Knight has glossy, black foliage and red flowers in August-September. To propagate from leaf cuttings: Remove a leaf from your Echeveria ‘Black Knight’ plant. Black Knight has glossy, black foliage and red flowers in August-September. Plant Black Knight in the sun in an average soil that is well-drained. Black Knight has glossy, black foliage and red flowers in August-September. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. 2304. The foliage is fine and elegant. Black Knight has glossy, black foliage and red flowers in August-September. Black Knight has glossy, black foliage and red flowers in August-September. Plant Black Knight in the sun in an average soil that is well-drained. Plant Black Knight in the sun in an average soil that is well-drained. The foliage is fine and elegant. Black Knight has glossy, black foliage and red flowers in August-September. Black Knight has glossy, black foliage and red flowers in August-September. Black Knight has glossy, black foliage and red flowers in August-September. Plant Black Knight in the sun in an average soil that is well-drained. Perovskia atriplicifolia. The foliage is fine and elegant. Black Knight has glossy, black foliage and red flowers in August-September. Black Knight has glossy, black foliage and red flowers in August-September. The foliage is fine and elegant. The foliage is fine and elegant. Black Knight Echeveria Read more; Black Prince Echeveria Read more; Black Rose Aeonium Read more; Blue Atoll Echeveria Read more; Blue Chalk Stick Read more; Blue Elf Aloe. The foliage is fine and elegant. The foliage is fine and elegant. Plant Black Knight in the sun in an average soil that is well-drained. The foliage is fine and elegant. The foliage is fine and elegant. Black Knight becomes about 50 cm tall and wide and is hardy to -15 ºC. Black Knight has glossy, black foliage and red flowers in August-September. Black Knight has glossy, black foliage and red flowers in August-September. Put your leaf cutting in the container and cover it with soil. Black Knight has glossy, black foliage and red flowers in August-September. Black Knight has glossy, black foliage and red flowers in August-September. Plant Black Knight in the sun in an average soil that is well-drained. Maksaruoho 'Black Knight'. Does not require supplemental water. The blue-green leaves of this succulent are tightly clumped, which makes it a stunning addition in pots. It is an excellent Sedum for the rock garden but also for the perennial border or for in a pot on terrace or balcony. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Plant Black Knight in the sun in an average soil that is well-drained. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Zatímco drobné květy. Sedum Black Knight ist eine starke Pflanze, die krankheitsresistent ist (bisher kein Mehltau signalisiert) und die nicht fault, also ideal für große Töpfe. Sedum selskianum Vytrvalá, kompaktní rostlina, jejíž sukulentní listy tvoří až 20 cm vysoké zelené kopce. Plant Black Knight in the sun in an average soil. Sunsparkler | Quality Cuttings. The foliage is fine and elegant. Plant Black Knight in the sun in an average soil that is well-drained. Black Knight has glossy, black foliage and red flowers in August-September. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Tolerates very light shade and poor soils. The foliage is fine and elegant. Plant Black Knight in the sun in an average soil that is well-drained. 150. The foliage is fine and elegant. Plant Black Knight in the sun in an average soil that is well-drained. Black Knight has glossy, black foliage and red flowers in August-September. Black Knight has glossy, black foliage and red flowers in August-September. Key PointsSedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Sedum Dark Knight - types and varieties, seeds in the Plant EncyclopediaDepth: 1/8 - 1/4 inch. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. The foliage is fine and elegant. The foliage is fine and elegant. PGR: Optional – For best results, use B-9 2500-5000 ppm. Sedum Back in Black is an upright Sedum variety great for a hot, sunny site. Black Knight has glossy, black foliage and red flowers in August-September. Sedum, or Stonecrop, is a large genus of flowering plant which has fleshy, succulent leaves, fleshy stems, and has clusters of small, starry flowers. ) is a massive genus of flowering plants that typically have thick. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. The foliage is fine and elegant. Plant Black Knight in the sun in an average soil that is well-drained. Plant number: 1. Sedum SunSparkler® 'Blue Elf' (PP27,113) : 65-72 degrees F. Night: 62-65 F. Let the leaf dry out for a few days until the cut area is dry and starts to form a callous. Plant Black Knight in the sun in an average soil that is well-drained. The foliage is fine and elegant. Sedum in a type of succulent, which are defined as plants that are able to store water in their leaves, stems, and roots. Plant Black Knight in the sun in an average soil that is well-drained. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Black Knight has glossy, black foliage and red flowers in August-September. It is an excellent Sedum for the rock garden but also for the perennial border or for in a pot on terrace or balcony. Black Knight has glossy, black foliage and red flowers in August-September. The foliage is fine and elegant. Black Knight becomes about 50 cm tall and wide and is hardy to -15 ºC. Plant Black Knight in the sun in an average soil that is well-drained. Black Knight has glossy, black foliage and red flowers in August-September. Black Knight has glossy, black foliage and red flowers in August-September. The foliage is fine and elegant. Black Knight has glossy, black foliage and red flowers in August-September. The foliage is fine and elegant. Blooms are medium to large, 1. Plant Black Knight in the sun in an average soil that is well-drained. Multiple crowns of flower clusters are dark pink and appear in late summer through late fall. 540. Drought. Black Knight becomes about 50 cm tall and wide and is hardy to -15 ºC. This outstanding dwarf selection has a short and very upright habit and glossy purple-black leaves. The foliage is fine and elegant. Black Knight becomes about 50 cm tall and wide and is hardy to -15 ºC. Black Knight has glossy, black foliage and red flowers in August-September. Black Knight has glossy, black foliage and red flowers in August-September. Growing Temp Night: 62°F to 68°F | 17°C to 20°C. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Synonyms. The foliage is fine and elegant. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Black Knight has glossy, black foliage and red flowers in August-September. The foliage is fine and elegant. Black Knight has glossy, black foliage and red flowers in August-September. The foliage is fine and elegant. Black Knight has glossy, black foliage and red flowers in August-September. Plant Black Knight in the sun in an average soil that is well-drained. Sedum 'Knight Rider' aka Knight Rider Stonecrop. The gorgeous Viola MAGNIFI SCENT® Collection has been bred for beauty and fragrance. Rozchodník | Sedum. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Black Knight has glossy, black foliage and red flowers in August-September. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make. Plant Black Knight in the sun in an average soil that is well-drained. The foliage is fine and elegant. The foliage is fine and elegant. Black Knight has glossy, black foliage and red flowers in August-September. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. The foliage is fine and elegant. Plant Black Knight in the sun in an average soil that is well-drained. The foliage is fine and elegant. : 150-200 ppm nitrogen. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. The foliage is fine and elegant. 'Dark Knight' is mound-forming, and has dark purple-black succulent foliage, and in late Summer and Autumn has clusters of bright magenta flowers. Plant Black Knight in the sun in an average soil that is well-drained. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. The foliage is fine and elegant. The foliage is fine and elegant. Sedum SunSparkler® 'Wildfire' PP28621. The foliage is fine and elegant. Ground Cover Perennials (0-25cm) Dward Perennials (26-60cm) Medium Perennials (61-85cm) Tall Perennials (86cm+) Rockery plants; Web Exclusive. Plant Black Knight in the sun in an average soil that is well-drained. The foliage is fine and elegant. Black Knight has glossy, black foliage and red flowers in August-September. Black Knight has glossy, black foliage and red flowers in August-September. Kasvaa hyvin aurinkoisessa paikassa, hyvin vettä läpäisevässä tavallisessa puutarhamaassa. The foliage is fine and elegant. Ihr Wasserbedarf ist gering, sie zeichnet sich durch eine gute Trockenheitstoleranz aus. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Plant Black Knight in the sun in an average soil that is well-drained. Plant Black Knight in the sun in an average soil that is well-drained. Plant Black Knight in the sun in an average soil that is well-drained. Plant Black Knight in the sun in an average soil that is well-drained. aka Desert Black Stonecrop. It is an excellent Sedum for the rock garden but also for the perennial border or for in a pot on terrace or balcony. Black Knight has glossy, black foliage and red flowers in August-September. Plant Black Knight in the sun in an average soil that is well-drained. Plant Black Knight in the sun in an average soil that is well-drained. Key PointsSedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Black Knight has glossy, black foliage and red flowers in August-September. Plant Black Knight in the sun in an average soil that is well-drained. Black Knight has glossy, black foliage and red flowers in August-September. Plant Black Knight in the sun in an average soil that is well-drained. The foliage is fine and elegant. Black Knight has glossy, black foliage and red flowers in August-September. Plant Black Knight in the sun in an average soil that is well-drained. Key PointsSedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Plant Black Knight in the sun in an average soil that is well-drained. Black Knight has glossy, black foliage and red flowers in August-September. 69 Kč / ks. Black Knight becomes about 50 cm tall and wide and is hardy to -15 ºC. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Check for roots after a. Black Eyed Susan ( ‘Goldsturm’) Rudbeckia fulgida Silver Sage Salvia (Salvia argentea) * Purple Flowering Sage (Salvia nemorosa) * May Night Salvia (Salvia sylvestris x ‘Mainacht’) * Lavender Cotton (Santolina chamaecyphrissus) * Soapwort (Saponaria ocymoide)s * Gold Moss Sedum (Sedum floriferum) *Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. The foliage is fine and elegant. Plant Black Knight in the sun in an average soil that is well-drained. Plant Black Knight in the sun in an average soil that is well-drained. The foliage is fine and elegant. The foliage is fine and elegant. Black Knight becomes about 50 cm tall and wide and is hardy to -15 ºC. The foliage is fine and elegant. Black Knight has glossy, black foliage and red flowers in August-September. Plant Black Knight in the sun in an average soil that is well-drained. Black Knight has glossy, black foliage and red flowers in August-September. October Daphne Stonecrop. The foliage is fine and elegant. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. The foliage is fine and elegant. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Rozmnožuje se pouze vegetativně, což zaručuje zachování jedinečných znaků odrůdy. The foliage is fine and elegant. Key PointsSedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Sedum Amber. The foliage is fine and elegant. Black Knight becomes about 50 cm tall and wide and is hardy to -15 ºC. With pulse-pounding desert car chases and the sleek, futuristic attire of the deliverymen known as the Black Knights, this highly anticipated series promises to. Black Knight has glossy, black foliage and red flowers in August-September. Plant Black Knight in the sun in an average soil that is well-drained. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Black Knight has glossy, black foliage and red flowers in August-September. 5″ in diameter. Plant Black Knight in the sun in an average soil that is well-drained. It is an excellent Sedum for the rock garden but also for the perennial border or for in a pot on terrace or balcony. Key PointsSedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. The foliage is fine and elegant. The foliage is fine and elegant. Plant Black Knight in the sun in an average soil that is well-drained. The foliage is fine and elegant. Black Knight has glossy, black foliage and red flowers in August-September. Bees and butterflies love its pink flowers, making this species perfect for pollinator gardens . The foliage is fine and elegant. Black Knight has glossy, black foliage and red flowers in August-September. Plant Black Knight in the sun in an average soil that is well-drained. Sedum 'Orbit Bronze' PP26189. The foliage is fine and elegant. Plant Black Knight in the sun in an average soil that is well-drained. Plant Black Knight in the sun in an average soil that is well-drained. Plant Black Knight in the sun in an average soil that is well-drained. Black. Tumma lehdistö tarjoaa hyvän kontrastin sekä kivikkoistutuksessa, perennapenkissä että puutarharuukussa. Helppohoitoinen ja sienitauteja kestävä lajike. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Sedum Back in Black - Common name: Upright Stonecrop, Stonecrop, Hylotelephium - The smoky near black fleshy foliage of this Stonecrop will add dramatic contrast and depth to any sunny garden. The foliage is fine and elegant. They are borne on stout,. Botanical Name: Sedum hispanicum ‘Blue Carpet’ Color: Blue. Plant Black Knight in the sun in an average soil that is well-drained. . Plant Black Knight in the sun in an average soil that is well-drained. Black Knight has glossy, black foliage and red flowers in August-September. The foliage is fine and elegant. Black Knight has glossy, black foliage and red flowers in August-September. The foliage is fine and elegant. Plant Black Knight in the sun in an average soil that is well-drained. The foliage is fine and elegant. Plant Black Knight in the sun in an average soil that is well-drained. Die pflegeleichte, mehrjährige Staude wird ca. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Plant number: 1. Plant Black Knight in the sun in an average soil that is well-drained. Plant Black Knight in the sun in an average soil that is well-drained. Blooms are medium to large, 1. Black Knight has glossy, black foliage and red flowers in August-September. The border varieties of Stonecrop are a dependable choice for the late summer and fall garden, offering both foliage interest and a colourful display of flowers in the autumn. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. The foliage is fine and elegant. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Tumma lehdistö tarjoaa hyvän kontrastin sekä kivikkoistutuksessa, perennapenkissä että puutarharuukussa. The foliage is fine and elegant. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Black Knight has glossy, black foliage and red flowers in August-September. Sedum, or Stonecrop, is a large genus of flowering plant which has fleshy, succulent leaves, fleshy stems, and has clusters of small, starry flowers. In a thrilling adaptation of the widely-acclaimed webtoon series, Black Knight plunges audiences into a dystopian vision of Seoul, now engulfed by sand and reliant on oxygen deliveries. Black Knight has glossy, black foliage and red flowers in August-September. Black Knight has glossy, black foliage and red flowers in August-September. Sedum kamtschaticum kvete v průběhu celého léta, tzn. Black Knight has glossy, black foliage and red flowers in August-September. Black Knight has glossy, black foliage and red flowers in August-September. The foliage is fine and elegant. The foliage is fine and elegant. Finely textured October Daphne sedum offers blue-green leaves that are edged with a deep pink line. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Sempervivum Black Pin. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Key PointsSedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Plant Black Knight in the sun in an average soil that is well-drained. Sedum 'Purple Emperor' Hybrid perennial sedum 'Purple Emperor' has dark purple, fleshy. The foliage is fine and elegant. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Key PointsSedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Plant Black Knight in the sun in an average soil that is well-drained. Plant Black Knight in the sun in an average soil that is well-drained. While it is drying, prepare a container with soil in the bottom. Black Knight has glossy, black foliage and red flowers in August-September. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. The foliage is fine and elegant. Sedum Black Knight is a strong plant that is disease-resistant (no mildew detected so far) and does not rot so it is ideal to make big pots. Black Knight has glossy, black foliage and red flowers in August-September. It is an excellent Sedum for the rock garden but also for the perennial border or for in a pot on terrace or balcony.