Dwarf peach

Origin & history

The peach does not come from Persia but from China, where it has been grown for more than 3,000 years; it reached Rome along the Persian trade route and still carries the misleading species name persica. In the wine districts of the Moselle, the Ahr and the Palatinate the red-fleshed vineyard peach has stood between the rows for centuries. The dwarfs, by contrast, are recent: they go back to a mutation that shortens the gaps between the buds to almost nothing, and were selected as pot trees in American nurseries from the 1960s onwards — “Bonanza” is the best known of them.

Varieties

Check that the label really says genetic dwarf: those trees stop at a good metre and a half on their own, whereas the usual patio peach is an ordinary variety on a weak rootstock and runs away from you every year. You can see it in the shoots, which are very short with the leaves crowded along them. What you find on sale is “Bonanza” with yellow flesh, “Diamond”, and among the nectarines “Nectarella”. Varieties with real tolerance of peach leaf curl, such as “Revita” or “Benedicte”, exist only among full-sized peaches — with a dwarf you answer the curl through where you stand it, not through the variety.

Care

A dwarf peach sets far more fruit than it can feed: once they are cherry-sized, thin to one fruit every 10 to 15 cm — that single job decides the size of everything you pick. Peaches carry only on one-year-old wood, so after harvest take out the shoots that have fruited and keep the strong new ones. Under a roof the tub gets no rain at all: water it every one to two weeks through February and March as well, or the root ball is dry before the tree even breaks bud. Feed from April to July and then stop.

What can go wrong

Peach leaf curl infects the buds at 8 to 10 °C as soon as they are wet, which means February decides what the foliage looks like in May — nothing you do in summer will. Pick off the curled, red-blistered leaves and put them in the household waste; the tree pushes a second, clean set in June but pays for it in crop and in reserves. The blossom often opens in early March, and minus two degrees on a clear night is enough: on those nights the tub belongs tight against the house wall or in a cold garage. The dry air under a roof brings spider mites — hose the foliage down with plain water now and then.

Harvest, storage & kitchen

Peaches ripen on the tree and not in the bowl: only when the ground colour under the red turns from green to cream and the flesh by the stalk gives to light thumb pressure does the fruit come away with a twist. Picking runs over two or three weeks, so go over the tree several times. At room temperature they hold two to three days; below 5 °C in the fridge the flesh turns mealy and tastes of nothing. For compote, a tart or the freezer, scald them for 30 seconds and the downy skin pulls straight off.

Frequently asked questions

Is a dwarf peach winter hardy?

Yes, the wood is winter hardy and stays outside over winter. In a tub it is the rootball that is delicate: it freezes from every side, whereas roots in a bed sit protected. So stand the pot on a sheet of polystyrene tight against the house wall and wrap it in hessian. The real weak point is the early blossom anyway, not the wood.

When are dwarf peaches ripe?

From early August to early September, depending on variety and site — roughly five months after flowering. If the summer stays cool and dull, picking slips later and the fruit tastes flatter, because sugar builds up mainly during sunny weeks.

Does a dwarf peach need a second tree for pollination?

No, peaches are self-fertile — a single tree crops fully. But it flowers so early in the year that hardly any insects are about: a sheltered, sunny wall gives a better set, and in cold years a soft brush moved from bloom to bloom makes up the difference.

When do you plant a dwarf peach?

In early spring, from the beginning of March to mid-April. That gives the tree all summer to root in; planted in autumn it would face its first winter without a proper root system. For a tub, reckon on 40 to 60 litres and a drainage layer of gravel or expanded clay against waterlogging.

Why do the small fruits drop in June?

Part of that is normal: the tree sets far more than it can feed and sheds the surplus itself. But if the rootball in the tub dries out even once, the drop is much heavier. Watering evenly and thinning by hand in good time costs you fewer fruits overall.