You weren't planning on growing only in bark chippings were you, MG ? Are they fresh, or old ?
The reason I ask is that fresh bark chippings are high in nutrients, but bacteria and fungi have to break the nitrogen down into an intermediate stage before it becomes available to the plants. As they do this, the bacteria that rot the wood tend to also use up the nitrogen in the soil or compost. It is only when the chippings have had a year or eighteen months to rot down further that plants can generally make any use of them.
I didn't get yields like yours the year I was learning that the hard way...we'll not bother with the photos !
The reason I ask is that fresh bark chippings are high in nutrients, but bacteria and fungi have to break the nitrogen down into an intermediate stage before it becomes available to the plants. As they do this, the bacteria that rot the wood tend to also use up the nitrogen in the soil or compost. It is only when the chippings have had a year or eighteen months to rot down further that plants can generally make any use of them.
I didn't get yields like yours the year I was learning that the hard way...we'll not bother with the photos !
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