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Composting Oak Leaves: Shred, Add Nitrogen, Keep Moist

Gambel oak leaves in Manitou Springs, CO, resist decomposition due to tannic acid. Shred leaves finely so microbes access them faster. Add nitrogen (1 cup 10-10-10 per 25 sq ft) to jumpstart decay. Keep pile moist—dry material doesn't decompose. Turn occasionally. Shredded leaves in bins decompose in months; whole leaves take years.

Faster Oak Leaf Compost

Shred leaves with mower or vacuum.
Add nitrogen fertilizer.
Maintain moisture like a wrung sponge.

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