Sunflower 'Sperling's Helios'

Try to plant in a location that enjoys full sun and remember to water often. Sperling's Helios is generally regarded as a half hardy plant, so remember to protect this plant from frosts and low temperatures. Sperling's Helios needs a loamy and clay soil with a ph of 5.7 to 8.1 (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). For optimal germination, soil temperature should be a minimum of 13°C / 55°F.

By our calculations, you should look at sowing Sperling's Helios about 21 days before your last frost date.

Sperling's Helios is half hardy, so ensure you wait until all danger of frost has passed in your area before considering planting outside.