Cosmos Flower Care Uk. This will help the germination of the seeds which should take about a week. Depending on where you are however cosmos may or may not be threatened by pests and or diseases.
Avoid soils that are too rich which can cause the plants to get too tall and flop over. In fact they prosper best in poor soils that have little to no fertilizer or mulch and are even sturdy enough to withstand droughts. Cosmos will easily survive in dry soil and can also thrive in arid desert-like conditions.
Usually grown from seed you may also find starts at a nursery.
How tall do cosmos grow. Jan 21 2021 You will need to water your cosmos plants regularly but take care not to over-water them. The two varieties of. Preventive measures include keeping the planting area clean of debris along with ensuring that the soil is dry and not constantly wet.