Sunflower 'Giant Yellow'

Hopefully self supporting, if not too windy.

Enjoys a full sun position in your garden and remember to water often. Keep in mind when planting that Giant Yellow is thought of as half hardy, so it will require protection in frosts and low temperatures. Planting Giant Yellow in loamy and clay soil with a ph of between 5.7 and 8.1 is ideal for as it does best in weakly acidic soil to weakly alkaline soil.

The seeds are large enough to place at the correct distance, plant two seeds iat a time and later remove the weakest plant
Or start off in pots and plant out in the flowering place after all frost

Sow at a depth of approx. 0.49 inches (1.25 cm) and aim for a distance of at least 4.68 inches (12.0 cm) between Sunflower plants. Soil temperature should be kept higher than 13°C / 55°F to ensure good germination.

By our calculations, you should look at sowing Giant Yellow about 21 days before your last frost date.

Plant out after all the frosts, choose a sunny but not too exposed position.

As Giant Yellow is half hardy, ensure temperatures are mild enough to plant out (around 10°C / 50°F as a guideline) - wait until after your last frost date to be on the safe side.

Harvest the seeds late autumn or leave for the birds

This variety tends to be ready for harvesting by late autumn.

The botanical epithet is from the Latin annuus meaning “annual”.¹
Helios is ‘sun’

¹ Latin Dictionary