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Grapefruit

Citrus x paradisi.

Grapefruit trees flourish in warm, subtropical to tropical climates, needing full sun and well-drained soil rich in organic matter. They prefer slightly acidic soil and benefit from regular watering, especially during dry periods, while avoiding waterlogged conditions. These trees are heavy feeders, so seasonal applications of citrus-specific fertilizers help promote healthy growth and fruit production. Grapefruit trees can grow up to 5-6 meters tall, though dwarf varieties are available. Fruit typically appears within 3-5 years, and pruning after the harvest helps maintain their size and shape.

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Plant Growing Tips

Where to Grow

Grapefruit trees thrive in full sun, so choose a location that receives at least 6-8 hours of direct sunlight daily. They are ideal for both garden beds and large pots. Ensure the planting site is well-drained and sheltered from strong winds, which can damage the trees and reduce fruit production. Grapefruit trees also benefit from being planted in a slightly elevated position or on a gentle slope to improve drainage and air circulation.

Climate

Grapefruits prefer a warm, subtropical to tropical climate. They grow best in temperatures between 18°C and 30°C. Protect them from frost and temperatures below 5°C, as cold weather can damage the trees and affect fruit yield. In cooler regions, consider planting grapefruit in a warm, sheltered spot or using frost protection measures during cold snaps.

Soil Type

Plant grapefruits in well-draining soil. A sandy loam enriched with organic matter, such as compost, is ideal. The soil should be slightly acidic to neutral (pH 6.0-7.5). Avoid planting in heavy clay soils or areas with poor drainage, as these conditions can lead to root rot and other soil-borne diseases.

Fertilizer

Feed grapefruit trees with a balanced, citrus-specific fertiliser every 6-8 weeks during the growing season (spring and summer). Ensure the fertiliser contains essential nutrients like nitrogen, phosphorus, potassium, and trace elements such as magnesium and iron. Reduce fertilising in autumn and winter when growth slows down.

Plant Care

Watering

Water deeply and consistently, particularly during dry spells. Let the top 5 cm of soil dry out before the next watering to prevent excess moisture. Young trees need more frequent watering to establish strong roots. Adding mulch around the base helps retain moisture and suppress weeds.

Pruning

Trim grapefruit trees in late winter or early spring to remove dead, damaged, or crossing branches. Regular pruning enhances airflow, strengthens structure, and allows better sunlight penetration, supporting healthy growth and fruit production.

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