Gadenin日本語Get the appThe rind is the crop
Anyone who grows yuzu expecting a bowl of juice is disappointed the first year. A fruit the size of a small orange, two to three inches (5-7 cm) across, has a thick lumpy rind, a large number of seeds and only a spoonful or two of very sharp juice. Squeezing a whole fruit gives you perhaps a fifth of what an equivalent lemon would.
What it does have, in a concentration no other citrus matches, is aromatic oil in the rind. The peel is knobbly and deeply pitted, and those pits are full of it; you can smell a ripe fruit from an arm's length away and the scent comes off on your hands as you pick. This changes how you judge ripeness, because you are judging rind condition and aroma rather than juice content.
It also changes what a good crop looks like. Twenty fruit from a young tree is a real harvest, because twenty rinds is a lot of zest. Do not measure a yuzu against a lemon by weight.
Two harvests from the same fruit
The fruit swells to full size well before it changes color, and it is usable from that point. Picked green, while the rind is still dark and firm, it is sharply aromatic, with a hard edge to the scent and a much more assertive rind. Left on the tree it turns from green through a mottled stage to a full deep yellow, and as it does the aroma rounds out, becomes floral and sweeter, and the rind softens and becomes easier to grate.
These are genuinely two different products, and the tree will happily give you both. Take part of the crop green in late summer to early autumn, when the fruit is full size but has not started to turn, and leave the rest to yellow through mid to late autumn. On a tree carrying a heavy crop, taking a share green also lightens the load at exactly the point in the season when that matters most for next year's flowering.
Do not leave the whole crop on into hard frost hoping for more color. Fruit that has fully colored holds on the tree for several weeks in cool weather, but a hard freeze damages the rind, the oil quality drops, and damaged fruit will not keep.
| Picking stage | Rind appearance | Aroma and use | Keeping |
|---|---|---|---|
| Green, full size | Dark green, hard, glossy pits | Sharp, high, cutting | 2-3 weeks cool |
| Turning | Mottled green and yellow | Between the two, well balanced | 3-4 weeks cool |
| Fully yellow | Even deep yellow, slightly soft | Rounded, floral, sweeter | 4-6 weeks cool |
| Over-mature | Dull, soft patches, dry pits | Flat, oil largely gone | Use at once |
How to pick without injuring yourself or the tree
Picking is the single most dangerous job on a yuzu, because the fruit hangs among the thorns and you have to reach in among them with both hands and your face close to the canopy.
- Gear up as you would for pruning Leather gauntlets covering the forearm and eye protection, every time, even for two fruit. Most thorn injuries happen on quick unplanned picks by someone who was only passing.
- Cut, never pull Snip the stalk with pruners or picking shears rather than twisting the fruit off. A pulled yuzu tears out a plug of rind, and that wound is where rot starts within days, ending any chance of storing it.
- Leave a short stub of stalk Cut about a quarter inch (5 mm) of stem attached, then trim it flush afterwards on the bench. A long stalk left on will spear the rind of the fruit next to it in the basket.
- Work from the outside in Clear the fruit you can reach without pushing branches aside first. That opens sightlines and reduces how far you have to reach in for the rest. Use long-handled picking shears for anything deep in the canopy.
- Handle the rind as the crop it is Lay fruit in a shallow tray in a single layer rather than dropping it into a bucket. Bruised oil cells go stale quickly, and a scratched rind loses aroma long before the fruit itself spoils.
Do not pick after rain or heavy dew if you intend to store the fruit. Wet rind held in a box is how a whole tray goes moldy from one damaged fruit. Let the tree dry for a few hours in the sun first.
Storing what you cannot use fresh
Whole undamaged fruit keeps four to six weeks in a cool room around 41F to 50F (5-10C) with some air movement, and noticeably less in a warm kitchen. Check the tray weekly and pull out anything with a soft patch.
For anything beyond that, take the rind off and store that instead, because the rind is the part that carries the value. Pared strips or grated zest freeze well in a sealed container and hold most of their aroma for months. The juice can be frozen separately in small quantities, and the seeds, which are numerous and large, are worth keeping out of both.
Do not try to store fruit you picked with a torn stalk end. Set those aside on picking day and process them first.
The harvest record that pays off
Note the date the fruit reached full size, the date the first fruit began to turn yellow, the date of each pick, and the count or weight taken at each. Add which of the picks you preferred to use, green or yellow, because that tells you how to split the crop next year.
Two or three seasons of these numbers give you the interval between flowering and full color in your own garden, which is the figure that lets you plan. They also give you a year-by-year total, and that total is the only reliable way to see whether the tree has fallen into a heavy year followed by a bare one, which is the single biggest thing that goes wrong with a mature yuzu.