Humus, the organic components that remain after decomposition of plant material by soil organisms, along with clay are the two major factors that help retain water and nutrients.
- A little humus in the soil mixture will naturally deter pests and disease.
- Avoid watering the leaves of mildew-prone species.
- Remove decaying leaf litter, branches and debris to avoid bacterial growth and fungal infection.
It is better for the peat to be bark humus. Actually, you could prepare a mix similar to one you would use in a bonsai pot: a mixture of coarse sand, peat and humus.
Hemlocks, for instance, are an evergreen needled tree that likes 70% humus and 30% grit, but the pines like even more grit than the 70%; purists in Japan grow pines in 100% sand. Find a soil that fits your watering schedule and your tree.
Organic fertilisers, like humus, leaf compost, manure, bark release these chemicals slowly to the plant as the organic matter decomposes. Inorganic fertilisers release these nutrients "faster" to the plant.
Often provided by the use of dead organic matter/ Humus, the soil needs to be able to hold and retain sufficient quantities of water and nutrients for the tree to absorb.
Good drainage.
The first use of the word "Australia" in English was in 1625-the words "A note of Australia del Espiritu Santo, written by Master Hakluyt", published by Samuel Purchas in Hakluytus Posthumus.
Bonsai soil should be a mixture of humus and grit, with ratios being based on the type of Bonsai that you are caring for. For example, needled evergreen trees should have a ratio of 70% humus and 30% grit whereas other trees (more.) ...
One thing apples have in common with conifers, however, is that they will grow in a variety of soils, from those rich in humus to almost pure sand and, finally clay.
Evergreen trees typically enjoy more humus or pine bark in their soil than do tropical plants. Tropical plants commonly enjoy more sand in their soil. Our basic soil mixture is composed of the following: ...
Water for your Bonsai tree is essential to life in itself, but it also acts as a vehicle to deliver nutrients through the roots system. Humus, the organic components of soil that remain after decomposition of organisms, ...
I use 1/3 small pebbles
1/3 vermiculite
1/3 very fertile soil (high humus content)
Chris from zone 6, Terre Haute, IN, US, says : ...
 See also: Plant, Bonsai, Tree, Species, Watering
  
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