Cosmos are one of the hardest-working annual flowers in the summer garden. Easy to grow, drought tolerant once established, and loved by pollinators, they can flower continuously from early summer right through to the first fall frost. Whether you're growing classic Cosmos bipinnatus, sulphur cosmos (Cosmos sulphureus), or one of the many newer compact varieties, a little attention in June can make a huge difference to just how spectacular that display becomes.
If you're learning how to grow cosmos successfully, June is an important month. Across much of the US, plants are now growing quickly, with many beginning to produce their first flowers. This is the ideal time to move beyond simply establishing your plants and start encouraging stronger growth, more blooms, and a longer flowering season.
