Sunflower 'Large Seeded Tall'

Try to plant in a location that enjoys full sun and remember to water often. Keep in mind when planting that Large Seeded Tall is thought of as half hardy, so remember to protect this plant from frosts and low temperatures. Planting Large Seeded Tall 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.

Try to aim for a seed spacing of at least 4.68 inches (12.0 cm) and sow at a depth of around 0.49 inches (1.25 cm). Soil temperature should be kept higher than 13°C / 55°F to ensure good germination.

By our calculations, you should look at sowing Large Seeded Tall about 21 days before your last frost date.

As Large Seeded Tall 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