The old practice of growing marrows on heaps is not good, as it is difficult to keep them supplied with sufficient moisture. A better plan is to dig out a trench 2 ft. wide and as much in depth and to fill this with a mixture of soil, dung, compost, old leaves, etc. Then, if a little extra soil is built in a low ridge around the bed, it will be a simple matter to flood the whole with water in dry weather. Seed should be sown in mid-April, singly in small pots filled with any good compost, and germination effected in a frame or greenhouse. Outdoors it is not safe to sow until the middle of May. Planting should not be done until early June. Plant bush varieties 3 ft. apart, trailing 4 ft. apart.
The runners of trailing varieties should be pinched out when they have extended 3 ft. This will force the plants to make side growths, which usually bear female flowers, and
consequently fruits, more freely than the main growths. Fertilize the female flowers, which can be recognized by the embryo fruits just beneath them, by inverting male blooms over them. Cutting should start as soon as the first marrows are of usable size. Only towards the end of the season should a few be allowed to remain to ripen. These, if cut without injury, may be stored for winter use in a cool, dry place.
Good trailing varieties are Long Green Trailing, Long White Trailing and Table Dainty. Good bush varieties are White Custard, Green Bush and White Bush. Courgette is a very prolific trailing variety grown to be cut when the fruits are about 6 in. long.