Can compost sustain a second crop without additional feeding or soil amendments?
In short: Charles Dowding investigates whether leftover nutrients in compost sacks can support a second harvest of leeks after potatoes. By omitting extra fertilizer, the trial reveals how different compost types perform during the latter half of the growing season.
This trial evaluates the residual growth quality of various composts by planting leeks directly into sacks previously used for potatoes. The experiment excludes a horse manure sack due to weedkiller contamination, which was instead spread on grass to dissipate in sunlight.
The study focuses on the performance of sieved wood compost and green waste compost. By October 16th, the harvest results demonstrate the remaining nutritional value of these materials without further intervention.
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Sources
- Summary by Intellect · source: Leeks after potatoes in the same sacks of different composts, one of soil
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