Sunflowers in Paradwys

Sow seeds around 7th April - 19th May in small pots or modules, or direct where they are to flower in mild areas. Sow seeds to a depth of 2–3 cm and keep the compost just moist while they germinate.

From 5th May to 19th May, move seedlings outside for longer spells each day so they adjust to wind and sun. Keep them sheltered from hard frost and check the compost so the roots do not dry out.

Plant out from 12th May once the soil has warmed and the risk of frost has passed. Space plants 30–45 cm apart, water them in thoroughly, and use fleece or a cloche if cold nights are still forecast.

From 2nd June to 14th July, fit a cane or stake beside tall plants before they become top-heavy. Tie stems loosely with soft twine and keep the base weed-free so the roots can spread.

From 18th June to 3rd November, remove fading flowers regularly so the plant keeps producing new blooms instead of putting energy into seed. Water during dry spells, and keep picking off spent heads until the autumn frosts slow growth.