How to Grow Gage (Greengage)
Fruit Tree
Gages, often called greengages, produce exceptionally sweet, aromatic dessert fruit with a delicate flavour unlike ordinary plums. They are worth growing where a warm, protected position is available, but may be less forgiving in cold exposed places. Their compact fruiting habit suits a carefully managed bush or wall-trained tree.
Planting & rootstocks
Grow gages on Pixy for a compact tree or St Julien A for a larger, more vigorous garden specimen; the rootstock controls ultimate size. Plant bare-root stock from November to March, while dormant and the soil is workable. Keep the graft union at least 10 cm above the finished soil level, stake well and water thoroughly. A fan against a sunny sheltered wall can improve ripening and make the fruit easier to protect.
Pollination
Many gages need a compatible plum or gage from an overlapping pollination group, and fruit set is often better with a partner. 'Cambridge Gage' is partly self-fertile, yet still benefits from a suitable companion. Confirm exact groups before planting because cultivar relationships vary. The RHS or a local garden centre can recommend matches that flower together in your district.
Care & pruning
Prune gages in dry summer weather, not winter, to reduce silver leaf and bacterial canker risk. Remove damaged, crossing and congested growth while retaining an open framework. Apply organic mulch in spring, clear of the trunk, and water consistently during dry weather while fruits swell. Feed lightly only where growth is weak. Thin congested fruitlets where possible and support branches carrying a heavy crop, as ripe gages can be surprisingly weighty.
Years to bear
Pixy-rooted gages can begin cropping in two to three years. Those on St Julien A more often take three to five years, especially if spring frost or poor pollination delays early fruit set.
Harvest
Harvest gages from August to September, often in several pickings. Fruit is ready when it has developed its full colour, smells sweet and yields gently near the stalk. Pick by lifting rather than pulling, as ripe fruit bruises easily. Eat promptly for peak flavour, or refrigerate briefly. Netting may be needed before fruits soften, as birds notice them early.
Common problems
Brown rot, aphids, plum moth, wasps and birds can spoil a gage crop; silver leaf and bacterial canker are risks after unsuitable pruning. Remove mummified and fallen fruit, maintain airflow, and prune only in dry summer weather. Use fine netting where safe and practical, encourage beneficial insects and keep the tree evenly watered. Frost-damaged blossom is a common reason for poor cropping.
Growing Gage (Greengage): frequently asked questions
How do I grow gage (greengage) in the UK?
Grow gages on Pixy for a compact tree or St Julien A for a larger, more vigorous garden specimen; the rootstock controls ultimate size.
Does gage (greengage) need a pollination partner?
Many gages need a compatible plum or gage from an overlapping pollination group, and fruit set is often better with a partner.
When is gage (greengage) ready to harvest?
Harvest gages from August to September, often in several pickings.
General guidance for UK home growers. Variety and pollination needs vary; the RHS or a local garden centre can advise for your area. Page updated 18 Sep 2026.