Outside of man himself, trees have countless enemies. There are 200,000 known kinds of insects that attack trees, in addition to diseases such as blight, rust and rot, storms and droughts. Luckily, birds help to keep caterpillars, borers, beetles and other insects in check.

Landscaping - Planting Trees

In planting trees, their mature height and spread must be considered before a selection is made. Tempting as are the nursery catalogs, it is necessary to choose carefully, especially on the average lot, because crowding spoils the growth and appearance of trees, particularly specimen trees.

In general, it is wisest and most economical to plant young trees. Planting a mature tree is difficult and, if done professionally, costly. If, however, a mature tree is badly needed for a terrace or for screening, it may well justify the expense. What you are buying is the time it takes a smaller tree to mature.

Today you can plant trees when in full leaf with the aid of new wilt-proof sprays that seal the leaves against moisture loss until the roots are established. This, however, costs money and entails greater risks than buying your tree and planting it in early spring( the best time) or late fall or winter.

If you are planting a tree over 6 feet tall, it will suffer less setback if moved with a bur-lapped root ball. The soil preparation described in the previous chapter is helpful for most tree and shrub planting. But since the root system must have fertile soil when it is planted, special steps must be taken. Dig a hole 2 feet deep and at least 1 foot wider each way than the full spread of the roots. The bottom of the hole should be broken up with a pitchfork and thoroughly mixed with peat, leaf mold, loam, etc.

Manure should be used sparingly and only on the top of the hole as it burns the roots. The deeper you can cultivate your hole, the better for your tree. Once it is planted, you can cultivate around it but not under the roots. If you strike a subsoil of building rubble or clay, which you are very apt to find anywhere near a house and in which a tree cannot grow, this subsoil must be removed and good soil, or better still, garden humus, substituted for it.