Moss In Flower Boxes - Knowledgebase Question

Surf City, NJ
Question by jcseagulls
April 15, 2000
Why do I have moss growing in my flower boxes. They get full sun and have good drainage. What can I do to eliminate this.

Answer from NGA
April 15, 2000


In some cases moss indicates some sort of soil imbalance such as extreme acidity, although it would be somewhat unusual to find that in a typical potting soil. Other causes for moss would be poor drainage or possibly more likely, compacted soil with low fertility levels. You might want to refresh the soil by at least a third to a half of its volume each year and add some good compost to it to try to remedy the situation. On the other hand, if your plants seem to grow well, the moss is not necessarily a problem.

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