Garden Cosmos 'Radiance'

Try to plant in a location that enjoys full sun and remember to water moderately. Keep in mind when planting that Radiance is thought of as half hardy, so remember to protect this plant from frosts and low temperatures. Radiance tends to grow best in a soil ph of between 6.0 and 8.5 meaning it does best in weakly acidic soil - weakly alkaline soil.

Try to aim for a seed spacing of at least 5.85 inches (15.0 cm) and sow at a depth of around 0.0 inches (0.0 cm). Soil temperature should be kept higher than 20°C / 68°F to ensure good germination.

By our calculations, you should look at sowing Radiance about 28 days before your last frost date.

Ensure that temperatures are mild and all chance of frost has passed before planting out, as Radiance is a half hardy plant.

The botanical epithet is from the Latin bipinnatus meaning “staunch” or “like two small wings”.¹

¹ Latin Dictionary