How to grow plums

How to grow plums - plum 'Victoria'

Plums make good small trees for most gardens and their delicious home-grown fruits make them even more worthwhile.

There are many different types of plum, including sweet and cooking varieties, damsons, gages, mirabelles and sloes. They have a variety of different uses, from eating freshly picked to making cakes and preserves and adding to gin. Plums can be grown as dwarf fruit trees, which remain naturally compact and are suitable for small gardens and balconies.

How to grow plums

Grow plum trees in moist but well-drained soil in full sun. Prune in summer and mulch in autumn with home-made compost or well-rotted animal manure. Harvest the plums when ripe and juicy.

More on growing plums:


Where to grow plums

How to grow plums - where to grow plums
How to grow plums – where to grow plums

Plums grow best in a sunny spot in well-drained, fertile soil. Most trees in the plum family come in sizes to suit all gardens. If you choose your tree carefully you can train it into your preferred shape – as a standard or fan. Smaller trees, grown on semi-dwarfing rootstock are easier to maintain.

The same growing conditions apply to most trees in the plum family, although gages grow best against a warm wall to ripen the fruit.

Damsons are hardier, smaller trees that will often do well where larger varieties fail. They can be trained on walls and grown as pyramids and are also used for windbreaks or hedging.

Many cultivars are self-fertile so you can get away with planting a single tree, but plum trees will generally produce a better crop if cross-pollinated with other plums. There are four pollination groups but plum trees flower at very similar times, and a plum tree in one group can be successfully pollinated by another variety in its own group or in a group above or below it. Look out for the pollination group when choosing your trees.


How to plant plum trees

Plant plum trees during the winter when trees are dormant. Bear in mind that bare-root plants usually establish better than container-grown trees. Young trees will need staking for the first few years.

Add plenty of well-rotted compost or farmyard manure to your planting hole. Or if growing in a container choose a generous size pot and add a mix of soil and compost to help prevent the plant drying out during hot weather.


How to care for plum trees

Pruning a plum in summer to avoid silver leaf disease

Plums are some of the earliest fruit trees to flower. Although the trees are hardy, frosts will kill the blossom. A sheltered, sunny location will protect them to some degree, but you may need to use horticultural fleece in freezing conditions.

When the fruits have formed by June or July, it’s best to remove some so they don’t overload the tree.


How to prune plum trees

Don’t prune plum trees in winter as this can cause them to develop silver leaf disease. Prune young trees in spring for shape and established trees later on, to remove dead and damaged wood. Summer pruning will keep the tree manageable, and allow the fruit to ripen.


Growing plums; problem solving

Wasp feeding on plum fruit

Plums are prone to aphids, birds, caterpillars, plum fruit moth and wasps.

The larvae of plum moth and plum sawfly tunnel through fruits leaving them inedible. The fruits may drop, but it’s worth looking out for the telltale puncture in the fruit in May. If you can spot them, remove these damaged plums before the larvae return to the soil. Pheromone traps can also help to protect trees.

Plums are also prone to silver leaf if pruned in winter. Brown rot and bacterial canker are also common problems. Watch Monty Don demonstrate how to prune out bacterial canker.

Find out why your plum might not fruit every year, in our Quick Tips video with Catherine Mansley:

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Harvesting plums

Plum 'Victoria'

Allow the fruits to ripen on the tree and pick them when they are soft to touch – the individual plums should pull away from the tree easily if ready.


Storing plums

Plums are best eaten fresh if uncooked, but can be preserved in jams, chutneys, or stoned and frozen to use in cakes, stews and more through the winter.


Plum varieties to try

How to grow plums - plum 'Victoria'
How to grow plums – plum ‘Victoria’
  • Prunus domestica ‘Victoria’ – the best-known variety, produces heavy crops of delicious, egg-shaped fruits, ideal for jams and chutneys as well as eating straight from the tree. Victoria plums are usually grafted on to a semi-dwarfing rootstock, so trees are compact and a good choice for small to medium-sized gardens. It’s self-fertile
  • Prunus domestica ‘Marjorie’s Seedling’ – reliable and disease-resistant, the fruits ripen in September and October. Good for eating and cooking, it’s self-fertile, but as it flowers mid-season, it can be cross-pollinated with most other plum trees
  • Prunus insititia ‘Farleigh Damson’ RHS AGM – also known as ‘Farleigh’ and ‘Farleigh Prolific’, this is one of the best damsons, especially if pollinated with another variety
  • Prunus cerasifera ‘Golden Sphere’ – a very hardy Mirabelle cherry plum, with large fruits that are good for eating and cooking. This is partly self-fertile and fruits are ready in late July
  • Prunus domestica ‘Cambridge Gage’ RHS AGM – one of the most popular greengages, because it is reliable and produces delicious green fruits with yellow flesh. It is good for jams and for eating. It’s self-fertile and crops in mid-August

 

Frequently asked questions

Why does my plum tree have no blossom?

If your tree is young, it may not be producing blossom yet. It can be a few years before plum trees begin to bear fruit. If your tree is older, it might have exhausted its reserves with a bumper crop last year. Sometimes this causes fruit trees to have a year without cropping and can suggest a problem with insufficient water or food.

Why is my plum tree covered in sticky white flecks?

The white waxy material is produced by mealy plum aphids. These aphids provide food for predators such as earwigs and ladybird larvae, and they’re an important part of healthy garden ecosystems. Trees are usually not damaged by aphids, so they’re best tolerated, if possible.

Why do my Victoria plums have a clear jelly-like sap coming out of them?

If you notice a resinous material on the outside of your plums, it’s unlikely to suggest a problem. It’s thought that fruits sometimes produce this clear resinous liquid (called “gumming”) as a response to the changing availability of water.  

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