Container Gardening
Q.

I sprinkle used coffee grounds in my planters to boost nitrogen

Zone Southern Ontario | sgirard added on June 25, 2014 | Answered

I sprinkle used coffee grounds in my planters to boost nitrogen. What symptoms will the plants show if there is too much nitrogen in the soil? I end up using about as much as 6 tablespoons of coffee grounds 2-3 times per week.

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theficuswrangler
Answered on June 27, 2014

Too much nitrogen typically shows up as flowering plants that have lots of green leaves but no blooms. It's almost impossible to create nitrogen toxicity. The amount of nitrogen contributed to the soil by coffee grounds is rather low, but it's all good. Check out this article on using coffee grounds in the garden : https://www.gardeningknowhow.com/composting/ingredients/coffee-grounds-gardening.htm

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