Garden Cosmos 'Giant Flowered Mixed'

Try to plant in a location that enjoys full sun and remember to water moderately. Keep in mind when planting that Giant Flowered Mixed is thought of as half hardy, so remember to protect this plant from frosts and low temperatures. A soil ph of between 6.6 and 7.8 is ideal for Giant Flowered Mixed as it does best in weakly acidic soil - weakly alkaline soil.

Try to aim for a seed spacing of at least 0.98 inches (2.5 cm) and sow at a depth of around 0.25 inches (0.64 cm). Soil temperature should be kept higher than 20°C / 68°F to ensure good germination.

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

As Giant Flowered Mixed 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 bipinnatus meaning “staunch” or “like two small wings”.¹

¹ Latin Dictionary