If money is no object you can now have a greenhouse or conservatory that looks after itself, with the plants watered automatically. On a more modest scale, garden frames and cloches are extremely useful (andcomparatively inexpensive) pieces of equipment: they are of particular value on the vegetable plot for extending the growing season at either end.

Eight types of greenhouse

Today greenhouses come in all shapes and sizes to suit every need and site.

• Span-roof greenhouse The traditional greenhouse, with pitched roof (each side of equal size and shape) sloping down to the eaves. Normally has straight sides, although there are models with sloping sides which result in better light penetration. The glass-to-ground types are ideal for growing plants at ground level, such as tomatoes in growing-bags; those with solid sides (to about 90cm/3ft) are good for pot plants, as they retain heat better than all-glass houses. Framework available in aluminium alloy or timber (such as western red cedar). You can now obtain span-roof greenhouses with curved eaves. Read the rest of this entry »

Birds usually create the biggest problem, but you should look out too for mites and weevils.

• Apple blossom weevil The small white grubs of this tiny brown beetle eat the central parts of apple flowers. Infested blossoms fail to open. Spray with permethrin as the buds are forming or fenitrothion as the buds burst open.
• Big bud mites Tiny mites that live in large numbers inside the buds of blackcurrants. Infected buds are swollen and round, and usually fail to come into growth. Pick off and burn; spray with benomyl fungicide in spring and early summer. Read the rest of this entry »

Alyssum is always associated with lobelia—usually planted alternately along suburban front paths and all right, I suppose, if you like that sort of thing. Once available only in white, it can now be found in pinks and purples that have more charm. Ageratum, too, now comes in some really deep shades of lilac and blue, which makes it more appealing for the front of the box. Again, pack it in tightly.

Dianthus, the annual, is increasingly produced for window boxes and also for hanging baskets. Most varieties flower in flushes, three or four times during the season rather than continuously, so it is a good idea to plant a second basket three weeks later in the hope that when the flush in the first one is over you can quickly replace it with the second just coming into its best. Read the rest of this entry »