The larger seeds of such shrubs as hazel, cornelian cherry, dogwood, wayfaring tree, medlar, blackthorn, bladdernut, spindle tree, etc., which take longer to germinate, should be sown directly in the autumn or else stratified for the winter and sown the following spring. The advantage of stratifying is that birds and rodents do not have access to the seed bed or frame during the winter. Also a good protective measure against birds and the like is to sprinkle the dampened seeds with red lead before sowing.
In gardening layering is used mainly for those shrubs that are not easy to propagate by cuttings' or grafting. Layering may be carried out either on the spot where the shrub is growing or else in a special bed to which the shrub to be increased is transferred. One advantage of the latter is that it is possible to prepare a soil mixture suitable for propagation, i.e. a lighter, sandy soil, and that the shrubs can be spaced far enough apart. Young one-year shoots root best.
As winter draws to an end it is necessary to check the seeds often to see if they are germinating, in which case they must be pricked out into a frame or in pots.
The simplest and easiest method of propagating shrubs is by division. This way, of course, it is possible to produce only one or at most several new individuals, but one great advantage is that they are usually sturdy enough to be planted out in the open immediately. This method can be used to propagate shrubs that continually shoot out new suckers from the base and have a tufted habit of growth.
The seeds should be covered with a layer of soil one to two times their own thickness. For instance rhododendron seeds should be covered with a layer about 1 mm thick, those of the golden rain with a 5 mm layer, the bladdernut with a 10 mm layer, etc. The best temperature for seed germination is 16C - 20C. The seeds must be kept moist at all times, preferably with a fine rose can so that they are not washed out.
Overwatering promotes the growth of mosses and lichens and can stifle the seedlings or even inhibit germination. It is a good thing to cover the pots containing the seeds with glass, turning it once each day to dry.
In gardening layering is used mainly for those shrubs that are not easy to propagate by cuttings' or grafting. Layering may be carried out either on the spot where the shrub is growing or else in a special bed to which the shrub to be increased is transferred. One advantage of the latter is that it is possible to prepare a soil mixture suitable for propagation, i.e. a lighter, sandy soil, and that the shrubs can be spaced far enough apart. Young one-year shoots root best.
As winter draws to an end it is necessary to check the seeds often to see if they are germinating, in which case they must be pricked out into a frame or in pots.
The simplest and easiest method of propagating shrubs is by division. This way, of course, it is possible to produce only one or at most several new individuals, but one great advantage is that they are usually sturdy enough to be planted out in the open immediately. This method can be used to propagate shrubs that continually shoot out new suckers from the base and have a tufted habit of growth.
The seeds should be covered with a layer of soil one to two times their own thickness. For instance rhododendron seeds should be covered with a layer about 1 mm thick, those of the golden rain with a 5 mm layer, the bladdernut with a 10 mm layer, etc. The best temperature for seed germination is 16C - 20C. The seeds must be kept moist at all times, preferably with a fine rose can so that they are not washed out.
Overwatering promotes the growth of mosses and lichens and can stifle the seedlings or even inhibit germination. It is a good thing to cover the pots containing the seeds with glass, turning it once each day to dry.
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In garden planning, weathering, lichen and the rambling clematis give a varied surface to this heavily mortared rubble wall in the garden.
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