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Cosmos Flowers

Q.Sowed Cosmos Seeds March, September No Flowers

Zone Senghenydd, Wales | Van win added on August 31, 2020 | Answered

These plants are 5-6 foot tall, stems thicker than your thumb. Very strong and healthy. 6 months later, still no sign of a single flower. Good fallow earth, added T&M flower food July & Aug.

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BushDoctor
Certified GKH Gardening Expert
Answered on September 1, 2020

It sounds like a problem with nutrient ratios. Too much nitrogen and not enough phosphorus and potassium can cause these symptoms. In general, the soil could be too rich in nutrients. These flowers cannot handle fertile soils.

Test your soil for deficiencies, overloads, or pH swings and correct as needed. Here are some articles that will help:

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-soil.htm

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/soil-ph-plants.htm

This article will help you to grow the flowers:

https://www.gardeningknowhow.com/ornamental/flowers/cosmos/growing-cosmos.htm

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