Growing Grapefruits

Grapefruits are not frost hardy so need to be grown in a greenhouse or conservatory. Varieties include Marsh's Seedless, Redblush and Wheeny. All are grown as bush trees.

Soil Conditions and Siting

Grapefruits hate bad drainage so they should be planted in a light sandy loam, enriched with plenty of organic matter. The pH of the soil should be between 6.0 and 6.5. The site should be sheltered and sunny.

Planting

Plants are available container grown or balled, both of which can be planted at any time of the year. They are usually grafted onto a rootstock. When transplanting ensure that the join to the rootstock is at least 4" (10cm) above the soil level.

Maintenance

Feeding

Apply a dressing of blood, fish and bone in spring and autumn. The young roots of Grapefruits are very tender so care should be taken when applying fertilisers. They should be applied sparingly and watered in well. Apply a mulch of well-rotted compost or manure to help conserve moisture.

Ensure that the plant is kept well watered. This is particularly important in the first couple of years of growth.

Pruning

Thin out overcrowded branches and remove any weak, sappy growth in the early spring.

Harvesting

Grapefruits are ripe when they turn bright yellow. They can be left on the tree until required. They will store on the tree in this way for up to six months. Twist the fruits gently off the branches.

Pests and Diseases

Gall Wasps, Red Spider mites, Aphids, Scale insects and Lemon Scab are possible problems. (See the pests and diseases sections for prevention's and cures).