How to Grow Scabiosa
Scabiosa atropurpurea
Scabiosa is a half-hardy annual grown for its elegant pincushion flowers, beloved by bees, butterflies, and flower arrangers alike. Sow indoors 6–8 weeks before last frost, pot up once, then transplant to a sunny, well-drained spot after all frost risk has passed. Pinch out growing tips early for bushier plants and more stems. Deadhead religiously — every spent bloom removed means another on the way. Prefers slightly alkaline soil; avoid waterlogging. An outstanding cut flower with a vase life of 7–10 days.
When to Start
Sow indoors 4 weeks before last frost, or direct sow outdoors after frost risk has passed and soil reaches 8°C.
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Growth Stages
Approximate days from start
Care Essentials
- Apply a balanced liquid feed every two weeks once plants are in their final position and coming into bud.
- Highly attractive to bees and butterflies. Prefers well-drained, slightly alkaline soil. Pinch out growing tips when young to encourage branching and more flower stems.
Growing Conditions
- Min. soil temperature
- 8°C+
- Germination temperature
- 15–20°C
- Sow indoors
- —
- Transplant out
- —
- First harvest
- —
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Spacing & Planting
| Plant spacing | 25 cm |
| Row spacing | 35 cm |
| Sow depth | 0.5 cm |
| Mature height | 60 cm |
| Mature spread | 45 cm |
Half-hardy annual cut flower. Start indoors and transplant after last frost. Pinch out tips when young for bushier plants and more stems.
Pests & Diseases
Pest Aphids
Identification: Clusters of small green or black insects on shoot tips and flower buds, causing distorted growth and sticky honeydew
- Blast off with a strong jet of water
- Spray with fatty acid-based insecticide
- Encourage ladybirds, lacewings and hoverflies
- Spray with a contact insecticide containing deltamethrin or lambda-cyhalothrin
Pest Slugs and Snails
Identification: Irregular holes in young leaves and slime trails around plants, worst in wet weather
- Use beer traps or copper tape barriers
- Apply organic slug pellets (ferric phosphate)
- Encourage natural predators such as hedgehogs and ground beetles
- Ferric phosphate-based pellets
Disease Powdery Mildew
Symptoms: White powdery coating on leaves and stems, causing yellowing and reduced vigour
Treatment: Remove badly affected leaves. Spray with a fungicide if severe
Prevention: Space plants well for good airflow, avoid overhead watering, and do not allow plants to dry out completely
Disease Root Rot
Symptoms: Wilting despite moist soil, yellowing leaves, blackened stem base, and collapse of the plant
Treatment: Remove and destroy affected plants. Improve drainage before replanting
Prevention: Ensure excellent drainage; never plant in waterlogged soil. Avoid overwatering, especially in cool weather
Growing Conditions
| Min. soil temperature | 8°C |
| Germination temperature | 15–20°C |
| Base growth temperature | 7°C |
| Min. daylength to start | 10h |
| Photoperiod sensitivity | day neutral |
Frequently Asked Questions
- How far apart should I plant Scabiosa?
- Plant Scabiosa 25cm apart with 35cm between rows.
- When does Scabiosa flower?
- Scabiosa typically flowers approximately 70 days after transplanting.
- Is Scabiosa frost hardy?
- Scabiosa is classified as Half Hardy.
