Sowed Cosmos Seeds March, September No Flowers

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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1 Comment To "Sowed Cosmos Seeds March, September No Flowers"

#1 Comment By BushDoctor On 09/01/2020 @ 10:44 am

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 ^[1]

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/soil-ph-plants.htm ^[2]

This article will help you to grow the flowers:

https://www.gardeningknowhow.com/ornamental/flowers/cosmos/growing-cosmos.htm ^[3]

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URLs in this post:

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

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

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

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