How to grow Garden Cosmos 'White seashells'
Try to plant in a location that enjoys full sun and remember to water moderately. Keep in mind when planting that White seashells is thought of as half hardy, so remember to protect this plant from frosts and low temperatures. White seashells tends to grow best in a soil ph of between 6.6 and 7.8 meaning it does best in weakly acidic soil - weakly alkaline soil.
Growing White seashells from seed
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.
Transplanting White seashells
Ensure that temperatures are mild and all chance of frost has passed before planting out, as White seashells is a half hardy plant.
Harvesting White seashells
The botanical epithet is from the Latin bipinnatus meaning “staunch” or “like two small wings”.
Footnotes