Cosmos is light sensitive, sowing too late in the Spring can delay flowering resulting in the dreaded ‘Cosmos Trees’!
However from my trials I have found that sown too early the lower light levels initiate flowering too quickly at the expense of vegetative growth giving short plants with small flowers.
About now is the ideal time to start Cosmos for the best of both worlds.
Love Zoe x
It’s been 8 weeks since we started our Cosmos bipinnatus.
The plants have grown strongly and some are even starting to form flower buds.
Cosmos as light sensitive, sow too late and you will end up with the dreaded Cosmos trees! However sowing to early can cause the plants to flower prematurely at the expense of good vegetative growth.
Early Spring (March) is ideal and plants are now ready to be potted on.