Sunflowers in Pentre Llifior

Sow seeds around 16th April - 28th 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 14th May to 28th 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 21st 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 11th June to 23rd 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 27th June to 19th October, 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.