Wood Ash

1% to 10% K. Lasts 6 months. Use up to 1.5 lbs (134 qt)/ 100 sq ft. Ash from wood is high in potassium and helps repel maggots. Ash also has an alkaline effect on the soil, so use it with care if your soil pH is above 6.5. Black wood ash is best. wood ash provides strength and plant essence, aids in insect control, and is a flavor enhancer for vegetables, especially lettuce and tomatoes. You can produce it with a controlled, soil-covered, slow-burning fire built during a soft drizzle or rain. This ash is higher in potassium and other minerals because they do not readily escape into the atmosphere as the wood is consumed by fire. wood ash should be stored in a tight container until it is used; exposure to air will destroy much of its nutrient value. Grey wood ash from a fireplace may be used if it is from wood and not from colored or slick paper.

Crushed Granite (Finely Ground)

3% to 5% K. Lasts up to 10 years. Use up to 8.5 lbs (3V2 qt)/ 100 sq ft. It is a slow-releasing source of potassium and trace minerals.

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  • fnan
    Is potassium good for growing vegetables?
    6 years ago

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