This section is from the book "The Gardener V2", by William Thomson. Also available from Amazon: The New Organic Grower: A Master's Manual of Tools and Techniques for the Home and Market Gardener.
Where the early crop is all gathered, give the trees a thorough washing with clean water through the engine, and continue to syringe or engine them two or three times a-week, to keep the foliage fresh and free from insects throughout the heat of summer. If the border is dry, let it also have a good watering, and keep everything connected with them tidy and clean. The starving of early-forced trees with the idea of ripening them is injurious to them. Keep them cool by giving an abundant supply of air at front and top. Where fruit are swelling off, continue to syringe the trees on the afternoons of fine days, shutting them up early and keeping the temperature to 65°, as a minimum, with as little fire-heat as possible. See last month's directions regarding fruit that are ripening. Tie in the growths and thin the fruit of later houses, and wherever fire-heat is applied, keep up atmospheric moisture in proportion.
Give fruit that are colouring abundance of air night and day, and see that none of them are shaded with leaves. Copiously water with manure-water, and mulch the surface of the borders of those swelling off their fruit, and syringe them freely on fine afternoons till they begin to change colour, after which syringe no more till the fruit are all gathered. Let no amount of care and trouble be con-sidei'ed too much in order to keep the foliage of the early trees from which the fruit are all gathered healthy and clean. Keep them cool, and mix a little flower of sulphur in the water with which they are syringed. This is an excellent preventive of red-spider, and Peaches seem to like sulphur about their leaves. Attend to the borders, and see that they do not become too dry and crack. Attend carefully to the growths of young growing trees, and tie them in their proper places, avoiding crowding them.
Look carefully over all trees from which fruit has been gathered, and if there are many shoots that will not be required for next season's bearing, remove them at once, so that all light and air may play about the trees freely. If there be any red-spider about them, syringe them with sulphured water till not one remains; and otherwise give every possible attention that is necessary to retain the foliage to the last in a healthy state, so that well-developed buds and matured wood be the result. Expose fruit that are ripen-ing to all light and air possible. Late crops in cool houses in their last swelling should be well supplied with water at the root till they begin to colour.
See last month's directions regarding trees from which the crops have been gathered; and in addition to the directions there given, let trees that are strong and have their wood not so solid and ripe as is desirable, have fire heat and a circulation of air in order to ripen them. If any vestige of red-spider remains or appears about them, give them a few vigorous washings on fine afternoons with the engine. Remove all shoots that may not be needed next year, and so allow a free circulation of air about all parts of the trees. Late crops in cool houses will now be ripening, and will require to be carefully guarded from flies and wasps, which will, now that the nights are cooler, seek refuge under glass. Push aside all leaves that in any way interfere with a full exposure of every part to sun and air, for a colourless Peach or Nectarine is an insipid-looking fruit. Look over the crop carefully, and gather all that are ripe, so as to prevent as much as possible a quantity of them from dropping into the nets, which should be fixed so as to catch any that may drop off.
Hexagon netting is an excellent material for this purpose.
Where new borders and fresh plantations of trees are contemplated, this is an excellent time to transplant the trees, just as they are beginning to show their leaves. There is, however, danger in beginning too early; for if not sufficiently matured, the process of removing them will cause the wood to shrivel. Trees planted a season or two ago, and that have grown too grossly, may now be partially lifted and root-pruned. Keep trees that are well ripened well aired and cool, but where the wood is rather green a little fire-heat will much assist their ripening.
Lose no time in getting those that are intended to be started next month pruned and tied. If there has been any red-spider about them last season, dress them as directed for Vines last month. Remove the surface-soil from the border, top-dress with rotten manure, and cover over with an inch or two of soil; and if the border is dry, give a good soaking of water, and towards the end of the month shut up the house, and keep the temperature from falling below 40°. Treat the outside as directed for Vines.
The early house prepared as directed last month may now have fire-heat regularly applied, keeping the temperature about 50° in mild weather, and a few degrees lower when cold. Proceed with caution for the first few weeks. Syringe the trees morning and afternoon with tepid water, give a little air early every fine day, and husband every gleam of sun-heat that can be had. prune and tie succession - houses. "Where planting young trees is contemplated, now is a good time to make ready. The drainage should be thorough and the loam rather strong than otherwise, and it is most undesirable to use much if any strong manure in making the border. It will tend to produce rampant unfruitful wood. Future top-dressings can be applied at the time when stimulants are required, and such have a tendency to induce the roots to work near the surface.
 
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