Lupinus 'My Castle' (Band of Nobles Series)

RHS Plant Profile

lupin 'My Castle'

RHS

Herbaceous Perennial

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A seed-raised, upright perennial to 90cm tall, with dense racemes of fragrant, brick-red to dusky rose flowers, often with a darker standard petal, in early and mid summer

Position

Full sun, Partial shade

Soil Types

Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.1-0.5 metres
Max Height: 0.5-1 metres

Growing Conditions

Loam Sand

Moisture: Well–drained
pH: Acid or Neutral

Position

Full sun Partial shade

Aspect: North–facing or East–facing or South–facing
Exposure: Exposed or Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H5

Colour & Scent

Fragrance Flower

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Fabaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Bushy
Potentially harmful: Harmful if eaten. Wear gloves and other protective equipment when handling. TOXIC to pets if eaten (dogs, cats, rabbits, tortoises) - see the HTA guide to potentially harmful plants for further information and useful contact numbers
Genus: Lupinus can be annuals, perennials or shrubs, with palmate leaves and showy terminal racemes of pea-like flowers
Name Status: Accepted

How to Grow

Cultivation

Grow in moderately fertile, humus-rich, light, moist but well-drained soil in full sun or light, dappled shade. See lupin cultivation. See lupin cultivation and also lupinus trial 2024-2025

Propagation

Propagate by seed sown in situ in late spring or in seedbeds and transplanted to final flowering site in autumn

Suggested planting locations and garden types

Cottage and informal garden
City and courtyard gardens
Coastal
Flower borders and beds

Pruning

deadhead to encourage a second flush of flowers

Pests

May be susceptible to slugs and lupin aphid

Diseases

May be susceptible to Powdery mildews, rots, a leaf spot and a virus