Gadenin日本語Get the appA year that starts in the cold
Most fruit trees give you a comfortable rhythm: flowers in spring, fruit in late summer, pruning in winter. Japanese apricot inverts it. The flowers open on bare wood in the depths of winter, before any leaf, the fruit is picked in early summer, and the main pruning happens immediately afterwards while the tree is in full leaf. If you manage it on the schedule you use for other stone fruit, you will prune off the flowers and miss every decision that matters.
The other thing that shapes the year is that the crop is always processed. The raw fruit is hard, sour and unwise to eat raw, so the harvest is not a stream of fruit picked as it ripens but a single operation you prepare for in advance, with containers and salt or sugar or spirit ready before you start picking.
Because flowering swings by two or three weeks from year to year with the winter weather, treat the stages below as a sequence rather than a calendar. Count days from the date your own tree came into flower, which is the one date worth writing down every year.
| Stage | What the tree is doing | Your job |
|---|---|---|
| Deep winter, bud color | Buds swelling on bare wood, no leaves anywhere | Start watching frost forecasts, get row cover and canes ready, remove any mummified fruit |
| Deep winter, full flower | Two to three weeks of scented blossom on bare dark wood | Cover before clear frost nights, uncover by morning, hand pollinate daily |
| Late winter, petal fall | Petals dropping, tiny fruitlets forming, first leaves appearing | Stop covering, mulch the root area, apply a balanced feed |
| Early spring, leaf out | Rapid leaf growth and the first new shoots extending | Check shoot tips weekly for aphids, wash colonies off, water young trees |
| Mid spring, natural drop | The tree sheds fruitlets it cannot carry | Wait for the drop to finish, then thin the rest to 2 to 3 inches (5 to 8 cm) apart |
| Late spring, fruit swelling | Fruit sizing fast, shoots still extending | Keep water even with one deep soak a week, watch for bored or split fruit |
| Early summer, picking | Fruit at full size, green and hard, then coloring if left | Pick green and hard, or leave to yellow, depending on what you are making |
| Early summer, after picking | Full leaf, still in active growth, wounds seal fast | Do the main prune now: open the center, shorten new shoots, renew tired spurs |
| Midsummer to autumn | Growth slowing, wood ripening, flower buds forming on this year's shoots | No nitrogen, no pruning, clear all fallen fruit, keep the trunk base clear |
| Late autumn, leaf fall | Leaves down, tree dormant, flower buds visible on the spurs | Plant new trees now, rake and destroy fallen leaves, inspect limbs for canker |
The flowering weeks decide the year
Everything that determines whether you get fruit happens in two to three weeks in the coldest part of the year. Open blossom is killed at around 28F (minus 2C), so a tree in full flower caught by one hard clear night drops the lot. At the same time almost no insects are flying, since most bees work only above about 55F (13C), and many kinds of this tree need pollen from a genuinely different second tree to set anything at all.
That means the flowering weeks carry three jobs at once: covering with row cover on clear nights below 30F (minus 1C), uncovering by morning so the tree does not sit damp, and moving pollen by hand with a soft brush on every dry day while flowers keep opening. It is perhaps twenty minutes a day for a fortnight, and it is worth more than everything else you do all year.
If your site gives you hard frosts through the whole flowering period every single year, be honest about it. Many gardeners grow this tree entirely for the winter blossom and simply accept that fruit comes in the mild years. That is a legitimate way to keep the tree, and it means you can stop fighting the weather and enjoy the flowers.
Watering the root area on the afternoon before a clear frost night is worth two or three degrees under the canopy, because moist soil stores and releases far more heat overnight than dry soil does.
The two jobs people get wrong
Two mistakes account for most disappointing trees, and both come from treating this tree like something else. Fixing them fixes most of what goes wrong.
- Do not prune in winter The flower buds are already on the spurs on last year's wood by midwinter, so a winter prune removes both the blossom and the crop. It also opens wounds in cool damp weather, which is when canker and silver leaf spores are most active. Prune in summer, after picking, in dry weather.
- Do not assume one tree is enough Many kinds will not set fruit with their own pollen. A single tree can flower spectacularly for a decade and never fruit, with nothing else to tell you why. Plant a second, genuinely different tree within 50 feet (15 m), or graft a second kind onto one limb of the tree you have.
- Do not feed nitrogen after midsummer Late nitrogen pushes soft shoots that will not harden before the cold, and unripened wood is the first thing that dies back and the first thing canker takes. Feed once as growth starts, add potash if growth is too leafy, then stop.
- Do not leave fruit hanging past full color Fruit left beyond full color drops, splits and draws wasps and boring insects to the tree. A tree overcarrying also sets fewer flower buds for the following winter, which is one cause of alternating heavy and light years.
- Do not pick and then decide what to do with it Hard green fruit holds a few days in a cool place and yellowed fruit barely two. Have your containers and processing ready before you start picking, or freeze the fruit whole as a holding measure.
The record that makes next year easier
This tree rewards record keeping more than most, because its dates move so much from year to year and because so many of its problems are silent. Keep it to one line per event and it takes a minute at a time.
Write down the date the first flower opened and the date the tree was fully out; every night you covered it, with the temperature; whether you hand pollinated and roughly what fraction of flowers set; the date of first and last picking with the weight off each tree; the number of days from full flower to first pick; the date you pruned and how much you took out; and the date you first saw aphids, rot or a bored fruit.
After two or three seasons those lines answer the questions you actually have. You will know how many days after flowering to have your containers ready, whether your site frosts the blossom often enough to give up on fruit, whether the tree wants a harder summer prune than you have been giving it, and whether a pest is building up year on year. None of that can be reconstructed later from memory, and all of it changes what you do.