Sunflower 'American Giant Hybrid'

Try to plant in a location that enjoys full sun and remember to water often. Keep in mind when planting that American Giant Hybrid is thought of as half hardy, so although it can survive a small mild cold snap, it is wise to ensure that this plant is protected from frost damage. Planting American Giant Hybrid 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.

Sow 0.49 inches (1.25 cm) deep with a guideline distance of 4.68 inches (12.0 cm). Soil temperature should be kept higher than 13°C / 55°F to ensure good germination.

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

As American Giant Hybrid is half hardy, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.

The botanical epithet is from the Latin annuus meaning “annual”.¹

¹ Latin Dictionary