When to plant Strawflowers in Oxford

Sow seeds in modules or trays around 10th March - 3rd April at a depth of 0.5 cm. Keep them at 18–21 °C and just moist until they germinate, then give them plenty of light so the seedlings do not stretch.

When the seedlings are large enough to handle, prick them out into individual pots around 31st March - 8th May. Handle them by the leaves, not the stems, and keep them growing on in bright, frost-free conditions.

Acclimatise the young plants gradually around 24th April - 22nd May. Put them outside for a few hours at first, then extend the time over about a week so they get used to sun and wind.

Plant out around 8th May - 22nd May once frosts have passed and the soil has warmed. Space plants 30 cm apart in full sun, and water in thoroughly straight away.

Check plants from 7th June as they settle in, and keep the soil evenly moist in dry spells. A light liquid feed every 14 days helps maintain growth without making the plants soft and floppy.

From 7th June onwards, deadhead fading flowers regularly by cutting stems back to a leaf joint. This stops the plant setting seed and keeps it flowering well until the autumn frosts.