How to Grow Grapefruit in NZ: Where It Grows and When to Plant

Updated October 2026

A citrus for the warm north, and a warm wall further south

Grapefruit need a long, warm season for the fruit to sweeten, which puts them among the more demanding citrus in New Zealand. The good news is that the backyard favourite here, NZ grapefruit, is hardier and sweeter than a true grapefruit, and it hangs on the tree for months once ripe.

A grapefruit tree grows 4 to 6 metres tall, or less on dwarfing rootstock, and a single tree gives a household plenty of fruit for breakfast and juice.

🌱 Plant profile: Grapefruit Tree, with sowing times for your region, companion plants and common pests.

Where Grapefruit Grow in NZ and When to Plant

Grapefruit are worth growing only in a handful of regions. They do best in frost free coastal Northland and Auckland, where you can plant from September to November. In Waikato and the Bay of Plenty they are marginal: plant only on the Bay of Plenty coast, in October or November after the frosts, in a warm, sheltered spot. In Wellington and the lower North Island, and in Nelson and Marlborough, they are also marginal. Choose NZ grapefruit, the hardiest type, and plant it against a warm, sunny wall out of the wind in October or November.

The rest of the country is not suited. The Central North Island is too cold for grapefruit to ripen. In Canterbury summers are too short and frosts too hard, so a Meyer lemon is the better bet. Otago and Southland are too cold, and hard frosts rule out grapefruit in Central Otago. Choose your region below for local planting months.

Grapefruit are planted in spring once the frosts are over, and only some regions suit them. These are the planting months for each of our nine New Zealand regions, and whether the region suits grapefruit, straight from our planting data. Each region links to its vegetable planting calendar, and the Grapefruit plant page has spacing, companions and care notes for your region.

Varieties to Look For

Planting

Plant container grown trees in spring once the frosts are over. Grapefruit want full sun, shelter from wind, and deep, free draining soil with a pH of about 6 to 7.5.

• Allow about 5 metres between trees, or less for a tree on dwarfing rootstock.
• In marginal areas, plant against a north facing wall or fence, where reflected warmth helps the fruit ripen.
• Plant at the depth of the pot with the graft union above the soil, water in well, and mulch, keeping mulch clear of the trunk.
• Dwarf grapefruit grow in a pot at least 50 centimetres wide. See our guide to growing citrus in pots.

Care and Pollination

Pollination. Grapefruit are self fertile, so a single tree fruits on its own. Bees visit the flowers in spring.

Watering. Water deeply and regularly, especially from flowering through summer. Irregular watering leads to split fruit and fruit drop.

Feeding. Feed four times a year with a complete citrus fertiliser, in August, November, January and April, the same schedule as oranges. See our orange growing guide for more on citrus care.

Frost. Cover young trees with frost cloth on cold nights for their first few winters. See our guide to protecting your garden from frost.

Pruning. Prune lightly after harvest and after the frosts, removing dead wood, crossing branches and shoots from below the graft.

Pests and Diseases

• Scale: Brown or white bumps on stems and leaves, often with black sooty mould growing on the sticky honeydew. Spray with horticultural oil.
• Aphids and mealybug: Cluster on soft new growth. Horticultural oil or a firm jet of water deals with light infestations.
• Citrus leaf miner: Silvery trails in new leaves, which then curl. Spray new flushes of growth with horticultural oil.
• Guava moth: The fruit pest that matters most in the warmer parts of the country. The caterpillar tunnels into developing fruit, citrus included. Use pheromone traps to tell when the moth is active, and bin fallen fruit sealed rather than composting it.
• Lemon tree borer: A native beetle whose larvae tunnel inside branches, leaving small holes and sawdust. Cut out and burn dead or wilting twigs below the damage.
• Collar rot: Oozing, cracked bark at the base of the trunk in wet soil. Keep mulch well clear of the trunk and plant only where water drains away.

For more detail, see our pest management guide.

How Long Until a Grapefruit Tree Fruits?

Our plant data allows about two years from planting a container grown tree to a good crop. The fruit itself is slow: our data puts the picking season from May right through to January, because NZ grapefruit colours in winter and keeps sweetening on the tree into summer. In the marginal regions, a warm wall that reflects heat helps the fruit ripen.

Harvest and Storage

Grapefruit take many months to ripen. NZ grapefruit colours in winter but is sharpest early, and the flavour sweetens the longer it hangs, through spring and into summer. The fruit holds on the tree for months, so taste one before picking the crop and harvest as you need it.

Cut fruit off with a short stalk. Picked grapefruit keep for 2 to 3 weeks in the fridge.

Frequently Asked Questions

See also: Grapefruit in the Plant Library

Related Guides

How to Grow Oranges

Growing Citrus in Pots

Protecting Your Garden from Frost