Gadenin日本語Get the appOne long cycle, not four tidy seasons
Shiranui runs a longer cycle than most fruit in a home garden. Flowers open in spring, fruit swells all summer, color breaks in autumn, the crop hangs through winter, and the fruit is only genuinely good weeks after it comes off the tree. For part of the year the tree is carrying a mature crop and building next year's growth at the same time, which is exactly why it alternates so hard when you let it.
Read the schedule below by what the tree is doing rather than by dates. The stages come in this order everywhere, but they arrive at different times depending on your climate and hemisphere, and the tree is a far better guide than a calendar.
| Stage | What you see | The decision that matters |
|---|---|---|
| Bud swell | Buds fatten, first flush begins | Prune now, before growth pushes |
| Bloom | Flowers open across the tree | Keep moisture steady, do not feed or disturb |
| Natural drop | Small fruitlets shed in early summer | Wait it out, do not thin yet |
| Thinning | Remaining fruitlets start sizing | Thin hard, this is the alternate-bearing fix |
| Summer swell | Fruit gains most of its size | Deep even watering, no drying and flooding |
| Color break | Rind turns orange in autumn | Stop nitrogen, do not pick yet |
| Hanging | Full-color fruit through the cold | Watch the forecast, protect or clear the tree |
| Picking | Fruit heavy, rind gives slightly | Clip flush, handle gently, never pull |
| Resting | Fruit stored cool for weeks | Taste at intervals, do not rush it |
Spring: prune, then leave the bloom alone
The pruning window opens once serious freeze risk has passed and closes when the first flush pushes. Take out dead and crossing wood, thin the interior enough to let dappled light reach the middle, and stop. On a low-vigor tree this should be a short job. Apply the first split of nitrogen as the flush begins, so the tree has it in hand while it is actually growing.
Once the flowers open, do nothing to the tree except keep the soil evenly moist. Do not feed into bloom, do not spray, do not move a container plant into a different position. Shiranui sets fruit without a pollinator nearby, so there is nothing you need to do to help it along and quite a lot you can do to disturb it.
If the tree is in its first or second year, strip the flowers off entirely. A weak young tree that fruits before it has built a framework stays small for years, and one full-sized fruit will bend a young branch permanently.
Summer: thin hard, then water without swings
Early summer brings the natural drop, when the tree sheds fruitlets it could never carry. Let it finish before you touch anything. Then thin what remains to roughly one fruit for every forty to sixty healthy leaves, taking out clusters, misshapen fruit and anything rubbing on a branch. This is the most consequential half hour of the shiranui year, because it is what stops the tree locking into a boom-and-bust rhythm.
Through the rest of summer the work is water. Deep soaks whenever the soil is dry four inches (10 cm) down at the canopy edge, and consistency above all: the split rinds and dropped fruit people blame on weather usually trace back to a dry fortnight followed by a heavy watering. Apply the second nitrogen split as fruit begins to swell, and a smaller final top-up in late summer before stopping for the year.
Watch the branches as the load builds. Prop or tie up anything hanging below the horizontal, using soft wide tape, and check the ties every few weeks as the wood thickens. It is far easier to support a limb than to repair a split crotch.
Autumn and winter: hang the crop, then get it in
Color break in autumn is not a picking signal. The rind turns full orange while the fruit is still sharp, and the acid falls slowly from that point on. Ease back watering a little as the weather cools and stop nitrogen completely, because a soft flush going into cold weather is the tissue that dies back first on this thin-wooded tree.
Then the crop hangs, and your job becomes watching the forecast. A shiranui will take a light frost on the fruit but a hard freeze ruins it: the flesh thaws dry and separated and no amount of resting recovers it. Somewhere in the mid twenties Fahrenheit (around minus 4C) is the point at which you strip the tree that day, ripe or not, and finish the fruit indoors.
Clear the tree completely once the crop is ready rather than leaving fruit hanging as decoration. Every fruit still attached in deep winter is drawing on the reserves the tree needs to set next season's flower buds, and that cost lands squarely on a variety that already alternates.
- Check the forecast weekly once fruit colors From color break onward, a single cold night decides the fate of the whole crop. A weekly look at the low temperatures for the coming days is enough to give you the day of warning you need.
- Have crates ready before you need them Shallow crates one or two fruit deep, ready in the shed, mean you can clear the tree in an afternoon when a freeze is called. Deep boxes crush the lower fruit and those bruises turn into rot during the weeks of resting.
- Wrap or cover on a borderline night For a light freeze, throw a frost cloth over the canopy in the evening and take it off in the morning. Fabric held clear of the fruit by a frame works; plastic touching foliage conducts cold straight through and makes matters worse.
- Rest the picked fruit before judging it Hold the crop cool, dry and dark in the forties to low fifties Fahrenheit (5-11C) for three to four weeks, tasting one at intervals. Fruit eaten in the week it was picked is sharp and tells you nothing about the crop.
The six dates worth writing down
Log the start of the spring flush, the date the natural drop ended, the number of fruit left on a marked branch after thinning, the date of color break, the picking date, and the date the rested fruit finally tasted right. Six entries a year, and each one answers a question you will otherwise guess at.
The pairing that pays for itself fastest is the thinning count set against the following spring's bloom, because it shows you in your own garden whether thinning is holding the alternate bearing in check. The second is the gap between picking and good eating: once you know your own tree's interval, you stop test-tasting sharp fruit and simply wait the right number of weeks.