Gadenin日本語Get the appOne tree, two entirely different harvests
This is the thing that makes shikuwasa unusual among small citrus and it is worth understanding before you pick anything. The fruit does not have a single point of ripeness. Taken while it is full size but still deep green, in late summer, it is intensely sour and strongly aromatic, and what you have is a juice and zest crop in the same category as any sour citrus. Left hanging on the same branch, the same fruit gradually colors to orange over the following months, the acid falls, the sugar rises, and by late winter it has become something you can eat out of hand.
Neither stage is the correct one. They are two different crops with two different uses, and the decision is yours to make fruit by fruit and branch by branch. A common approach is to take perhaps two thirds of the crop green while it is at its aromatic peak, and leave the rest, thinned harder, to hang and sweeten.
What you cannot do is have both from the same fruit. Once a fruit has been picked green it will not sweeten off the tree; it will simply dry and lose aroma. And a fruit left to color has already lost the sharp aromatic character that made the green picking worth doing. Decide before you pick, not afterwards.
| Stage | What you see | What it is for |
|---|---|---|
| Small, hard, dark green | Not yet at full size for its position | Too early; little juice and harsh |
| Full size, deep green, skin tight | Firm to squeeze, strong scent when scratched | Peak green picking: sharp juice and zest |
| Green fading toward pale yellow-green | Skin slightly softer under the thumb | The green window is closing; pick now or commit to holding |
| Mottled yellow and orange | Coloring unevenly, still firm | In transition; sour but no longer aromatic, best left |
| Fully orange, slight give | Skin colored through, softer | Sweet enough to eat; the second harvest |
| Orange and soft, skin loose | Puffy, dull scent | Past it; use immediately, will not keep |
The green harvest: pick at full size, before color starts
For the green crop, size is the signal and color is the deadline. The fruit should have reached full size for its position on the tree, the skin should still be tight and glossy over the flesh, and scratching the rind with a thumbnail should release a strong, sharp scent immediately. That is the peak, and it typically arrives in late summer.
The oil in the rind is at its highest concentration and its sharpest character while the fruit is green, and the juice beneath it is bracingly sour with a clean edge. As soon as color begins to break, the rind starts to coarsen, the oil quality falls away and the acid drops. So the green picking decision is not about waiting for the fruit to reach a target but about catching it before it leaves the target it is already sitting on.
Go over the tree every four or five days once the first fruit is at full size, rather than stripping it in one session. Fruit on the outer sunlit wood fills before fruit in the shaded interior, sometimes by two or three weeks, and picking over the tree repeatedly means every fruit is taken at its own peak. It also lightens the load on the branches gradually instead of all at once.
The late harvest: leaving fruit to color and sweeten
Holding fruit on the tree through autumn and into winter is the second crop, and it needs to be set up deliberately rather than happening by default with whatever you failed to pick.
- Choose which fruit stays before you start picking green Pick a few well-placed branches, ideally on the sunniest side and away from the congested interior, and leave those. Fruit that will hang for months wants light and air more than the green crop does.
- Thin the holding branches harder Leave one or two fruit per cluster rather than two or three. A fruit that stays on the tree for months draws on it the whole time, and crowded fruit hanging that long will rub each other's thin rind through.
- Keep feeding and watering through the season Honour the full summer feeding program and stop at the end of summer as usual, but do not let the tree go dry in autumn. Fruit that is meant to sweeten stalls on a tree that has run short.
- Protect the hanging crop from frost The fruit is more frost-sensitive than the wood. A light frost damages hanging fruit before it damages the tree, so a holding crop is one more reason to row cover or to move a pot under cover early.
- Test rather than trusting the color Full orange color arrives before full sweetness. Once colored, take one fruit every couple of weeks and taste it. When the sourness has softened enough for your liking, pick that branch; leaving it longer only softens the skin further.
- Clear everything before the tree needs to move Do not carry a hanging crop into a heated indoor space for the winter. The fruit will go soft in the warmth. Pick before you bring the pot in, whatever stage it has reached.
A tree carrying a heavy load of fruit deep into winter has less in reserve for the following spring, so a full second harvest every year on the same tree is a reliable route into alternating heavy and bare seasons. Hold back part of the crop, not most of it.
Thin skin changes how you pick and how you keep it
The rind on this fruit is noticeably thinner than on most sour citrus and the oil glands sit close to the surface. That is why the aroma is so strong when you scratch it, and it is also why the fruit bruises, punctures and rots more easily than a thick-skinned citrus. Every step of picking has to allow for it.
Pick with snips and never by pulling. Tugging a fruit off tears a plug out of the rind at the stem end, and torn thin rind rots within days rather than weeks. Cut the stalk flush with the top of the fruit so that no stub is left projecting, because a single protruding stalk will puncture three or four other fruit in the bottom of a basket before you notice.
Handle each fruit once. Every handling bruises oil glands, which is charming at the time because the scent is released, and it is scent you no longer have later. Move fruit from the tree into a shallow container in one step, in a single layer, and sort as you go: anything scarred, punctured or split will not keep and will spoil what it is touching.
| Crop | Storage | How long it holds |
|---|---|---|
| Green fruit, unblemished | Single layer, cool and airy, 45-50F (7-10C) | Two to three weeks with aroma intact |
| Green fruit, marked or punctured | Do not store | Use within a day or two |
| Green fruit, heavy crop | Juice frozen in small portions, rind grated and frozen dry | Months, with far better aroma than whole fruit |
| Colored fruit, firm | Cool room, single layer, not sealed | One to two weeks |
| Colored fruit, soft or puffy | Do not store | Eat or process the same day |
| Any fruit, sealed in a bag | Not suitable at any stage | Sweats and rots within days |
Record both windows, not just the total
Write down the date you took the first green fruit and the date you finished the green picking, then separately the date the held fruit first colored fully and the date you decided it was sweet enough. Those four dates are the most useful thing you can know about your own tree, because they shift with your climate and your position and they will be broadly the same next year.
Add the number of fruit taken in each harvest and how many you had to discard for rubbed, punctured or split rind, along with where on the tree they were growing. Losses that cluster on one exposed side tell you the fix is shelter or harder early thinning, and you will only ever see that pattern if you noted where the damaged fruit came from. After two seasons you will know, before the season starts, roughly how much of the crop is worth holding for the late harvest and how much to take green.