Your assertion that wood ashes is "not good for marijuana" is absolutely incorrect. In fact; it is very beneficial on a number of fronts. Do some research first before commenting on something you (obviously) know nothing about. I use it all the time, as do many seasoned growers, with great success.
I suppose you just couldn't wrap your head around the idea, and thus, responded ignorantly. Many n00bz will do this. Again, do some research before responding on matters you know nothing about. Peace.
Legalise
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Since Roman times, wood ash has been recognized as a useful amendment to the soil. In fact, North America exported wood ash to Britain in the 18th century as a fertilizer, and today, 80 per-cent of the ash produced commercially in the Northeastern United States is applied to the land. Since wood ash is derived from plant material, it contains most of the 13 essential nutrients the soil must have for good plant growth and health.
When wood burns, nitrogen and sulfur are lost as gases, and calcium, potassium, magnesium and trace element compounds remain. The remaining carbonates and oxides are valuable liming agents, raising pH, thus neutralizing acid soils. Soils that are acid and low in potassium benefit from wood ash. However, acid-loving plants such as blueberries, cranberries, rhododendrons and azaleas would not do well at all with an
application of wood ash.
Wood ash has a very fine particle size, so it reacts rapidly and completely in the soil. Although small amounts of nutrients are applied with wood ash, the main effect is that it is a liming agent. The average ash is equivalent to a 0-1-3 (N-P-K). The chemical
makeup varies with the type of wood burned. Hardwoods produce three times as much ash per cord as do softwoods.
Calcium and potassium are both essential to plant growth. Calcium is needed for root development, strong cell walls and protein formation in the plant. Potassium is an important catalyst in photosynthesis and is essential for the movement of sugars, seed formation, protein synthesis and the use of nitrogen in plants.
The best time to
apply wood ash is in the spring when the soil is dry and before tilling. In compost piles wood ash can be used to maintain a neutral condition, the best environment for microorganisms to break down organic materials. Sprinkle ash on each layer of compost. This is especially good if you have oak leaves or pine needles in your compost heap.
Wood ash can be used to repel insects, slugs and snails because it draws water out of these invertebrates. Sprinkle ash around the base of your plants to discourage surface-feeding insects. Once ash gets wet, it loses its deterring properties. Too much ash can increase pH or accumulate high levels of salts that can be harmful to some plants, so use ashes carefully.