Perennial

Delphinium ‘Black Knight Group’

Delphinium Black Knight Group
Good for cut flowers badge Hardiness H5

Delphinium Black Knight Group reaches 1.75m with dark purple-blue spires touched with black centres. Its bold vertical stems rise in June and July, making it a favourite in cottage borders and a superb choice for cut flowers. Large in scale and columnar in habit, it adds both drama and elegance to Irish summer plantings.
SKU: DEL-4L-TS0J3Y
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Flowering Months
Jan J
Feb F
Mar M
Apr A
May M
Jun J
Jul J
Aug A
Sep S
Oct O
Nov N
Dec D
Size
Max Height
1.5 m — 2.5 m
Max Spread
0.5 m — 1.0 m
Growth Habit
Tall, narrow growth habit with strongly vertical main stems.
Planting Position
Sunlight i Indicates how much direct sunlight the plant needs each day. Full sun means 6+ hours, part shade is filtered or morning sun, and full shade is little to no direct sun.
Full Sun
Aspect i Aspect refers to the direction the planting spot faces (north, south, east or west). It affects light levels, warmth and exposure.
South East West
Exposure i Exposure describes how sheltered or exposed a plant’s position is, particularly to wind and weather.
Sheltered
Hardiness i Hardiness indicates how well a plant tolerates cold conditions outdoors. Higher ratings generally mean greater frost tolerance.
(−15 to −10 °C) Cold-hardy
Ideal Soil Conditions
Soil Type i Soil type describes the texture of the soil (clay, sand, loam, chalk). This affects drainage, nutrients and how roots grow.
Chalk Loam Sand
Soil Moisture i Soil moisture tells you how wet or dry the soil should be for best growth. Match this to your garden conditions for healthier plants.
Moist but permeable / Free draining
Soil pH i Soil pH measures how acidic or alkaline the soil is. It affects nutrient availability and can impact plant growth.
Acid Alkaline Neutral
Plant Uses & Merits
Uses
  • Patios / Courtyards
  • Flower Borders
Merits
  • No pruning required
  • Good for Cut Flowers

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