How to grow Scabiosa from seed in South Africa

This range contains two different crops. Choose the species module printed for your variety.

• **Annual-type Scabiosa atropurpurea:** Black Knight, Fire King, Salmon Queen and Snowmaiden.
• **Perennial Scabiosa caucasica Fama:** Fama Deep Blue and Fama White.

Both prefer sun, cool-to-mild growing weather, free drainage and good airflow. They decline in saturated soil and prolonged extreme heat.

Module A: Black Knight, Fire King, Salmon Queen and Snowmaiden

These S. atropurpurea selections are annual or short-lived perennial plants normally grown as annual cut flowers.

Sowing and care

1. Sow one or two seeds per cell, cover lightly and keep evenly moist with good airflow.
2. Give seedlings strong light after emergence. Thin to the strongest plant and transplant before roots bind.
3. Harden plants and set out in a sunny bed with free-draining soil. Direct sowing is possible in cool, settled weather.
4. Water deeply but do not keep the crown wet. A light balanced feed supports stem production; excess nitrogen gives soft growth.
5. Pinch once when plants are well established if more, slightly shorter stems are preferred. Leave unpinched for the earliest central stem.
6. Deadhead or cut continually. In cut rows, sow small successions two to three weeks apart during the suitable cool window rather than one very large batch.

Module B: Fama Deep Blue and Fama White

Fama is a first-year-flowering perennial S. caucasica. Benary states that it flowers without vernalisation; it does not require an artificial cold treatment. It is a different crop from the annual Scabiosa above.

Sowing and care

1. Sow one to two coated seeds per deep cell. Keep the surface moist until the coating dissolves and the radicle appears, then gradually allow more air into the medium.
2. After cotyledons expand, grow seedlings cooler at about 16–18 °C with strong light.
3. Harden thoroughly and transplant without burying the crown. Fama performs best where the crown stays dry and the root zone drains freely.
4. For garden plants, use the wider spacing. Intensive 15 cm spacing is for managed cut-flower rows and needs excellent airflow and feeding.
5. Remove spent blooms to encourage repeat stems. In a suitable cool, drained site, the crown can regrow for more than one season.

When to sow in your region

Winter-rainfall Western Cape: Sow in autumn for cool-season growth or in late winter for spring flowers. Use a raised, sharply drained bed where winter rain is prolonged; crown rot is a bigger risk than cold in saturated soil. Protect long stems from wind.

Frost-prone interior: Start under protection in late winter for spring planting, or sow annual S. atropurpurea in late summer for an autumn display before severe frost. Established Fama can tolerate more cold than the annual types, but seedlings and new transplants still need hard-frost protection.

Humid coast and KZN Midlands: Grow through the coolest, least humid period and use the widest garden spacing. Water early at soil level and remove diseased material. Fama’s long-term persistence may be limited on the hot, humid coast; treat it as a trial perennial there. Account for frost pockets in the Midlands.

Hot-dry or subtropical interior: Sow in late summer to autumn for cool-season flowering, or in protected late winter where frost occurs. Mulch the root zone without covering the crown, irrigate deeply and provide afternoon relief during extreme heat.

Flower and harvest outcome

For annual S. atropurpurea, cut when the flower is almost fully open and the stem is firm. For Fama, cut from coloured bud to half-open stage for transport and vase use. Place stems in clean water immediately. Scabiosa also forms decorative seed heads; harvest them while green and firm, before they brown and shed.

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