Pretty much carefree once established.
Try to plant in a location that enjoys full sun and remember to water moderately. Keep in mind when planting that Early Sensation Mix is thought of as tender, so it is really important to plant out well after your last frost date. Try to keep the ph of your soil between the range of 6.6 and 7.8 as Early Sensation Mix likes to be in weakly acidic soil - weakly alkaline soil.To keep cosmos from reseeding deadhead spent flowers before seeds have a chance to mature.
Sow at a depth of approx. 0.25 inches (0.64 cm) and aim for a distance of at least 0.98 inches (2.5 cm) between Garden Cosmos plants. Soil temperature should be kept higher than 20°C / 68°F to ensure good germination.By our calculations, you should look at sowing Early Sensation Mix about 28 days before your last frost date.
The botanical epithet is from the Latin bipinnatus meaning “staunch” or “like two small wings”.1
Cosmos