What To Do With The Old Mulch? - Knowledgebase Question

Westbrook, ME
Question by karensue
April 15, 2000
Should last year's mulch in my flower gardens be removed or mixed in with the soil?

Answer from NGA
April 15, 2000


The old mulch can be left in place and topped up to regain a two to three inch layer if it has broken down gradually over the winter. If it has deteriorated substantially it can also be worked into the soil, although working in a very woody mulch might require the addition of some supplemental nitrogen to compensate for its high carbon content. Old rotted or composted mulch is certainly a useful soil amendment.

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