Gadenin日本語Get the appThe one or two stalk rule
The plant is named for the speed at which a picked leaf is replaced, and on a healthy established crown a new stalk really does start to unfurl within a couple of days of a cut. That reputation gets a lot of plants ruined, because it only holds when you take a little. Cut one or two outer stalks from a mature plant and it responds immediately. Take half the plant at once and it stops, sits still for three or four weeks, and comes back with smaller, tougher leaves.
Work from the outside in. The oldest stalks are the outermost ones, and they are the ones the plant is already finished with. The tight cluster of furled new growth in the center is next year's productivity as much as this month's, and it should never be cut. On a plant with a dozen stalks, taking two a week through the season is a sustainable rate that keeps a household supplied.
Never take more than a third of the standing leaf at any one time, even from a large old plant, and never cut a first-year plant at all. If you need a large quantity at once, grow more plants rather than cutting one harder. Two or three crowns picked lightly in rotation produce far more over a season than one crown picked hard.
| Plant age | Stalks to take at one time | Frequency | Notes |
|---|---|---|---|
| First season from seed | None | Not at all | The whole year goes into building the taproot |
| Second season | One or two outer stalks | Every week or two | Stop entirely if new growth slows |
| Third season and beyond | Two or three outer stalks | Weekly through the growing season | Never more than a third of the standing leaf |
| Any plant, late in the season | None | Stop six weeks before hard frost | Late cutting costs next spring's growth |
| A plant that has flowered | As much as you want | Once | It is dying anyway; take everything usable |
Cutting technique and the yellow sap
Cut, do not tear. Use a clean sharp knife or snips and take the stalk at its base, leaving a short stub of half an inch (1 cm) rather than cutting flush into the crown. A torn stalk strips a ribbon of tissue down into the crown and leaves an open wound that rots in wet weather. Cut on a dry morning so the wound seals before evening.
Every cut stem bleeds a sticky yellow sap almost at once. It is thick, it sets to a varnish-like film, and it stains skin, clothes, knife blades and worktops a persistent yellow-brown that does not simply wash out. On skin it can cause irritation, and on some people it produces a rash that is noticeably worse after sun exposure, so treat it as something to keep off you rather than something to wipe off later.
Wear gloves and long sleeves for anything more than a stalk or two, and harvest into a bucket or basket rather than under your arm. Wash the knife immediately, because dried sap on a blade is genuinely difficult to remove. If sap gets on skin, wash it off with soap and water straight away and keep that patch out of direct sun for the rest of the day.
- Put gloves on before you start Nitrile or rubber gloves and long sleeves. The sap is released the instant the stem is severed and runs down the outside of the stalk, so it reaches your hands even if you only cut with the blade.
- Choose outer stalks with fully hardened leaves Take stalks whose leaves are fully expanded and firm. Skip anything still soft and pale at the center, and skip anything already yellowing, which has little left in it.
- Cut low but leave a stub Sever the stalk cleanly half an inch (1 cm) above the crown. Angle the cut slightly so water runs off rather than sitting in the hollow stem.
- Stand the stalks cut-end down for a minute Let the sap drain into the bucket rather than over the leaves you are about to eat. Then wash the stalks and dry them before storing.
- Clean up Wash the blade, your gloves and any surface the cut ends touched while the sap is still wet. Once it has dried to a film it needs scrubbing with soap and hot water.
When the leaf is at its best
Quality peaks on stalks that have just finished expanding: the leaf is glossy, deep green and slightly soft, and the stalk snaps cleanly rather than bending. Older stalks go matt, the ribs stand out, and the stalk becomes fibrous enough to need stripping. Spring growth after a winter rest is the tenderest of the year, and growth in the cool weeks of autumn is a close second.
Midsummer leaf on a plant in full sun is noticeably tougher and stronger flavored. If your summers are hot, expect a dip in quality through the hottest weeks and pick a little less, then more again when nights cool. Shade improves midsummer texture more than extra water does.
Once a plant has started to run to flower the leaf quality drops sharply and the stalks turn fibrous within a couple of weeks. That is a signal to cut the flower stem out immediately if you want to keep the plant, and it also explains a sudden decline in a crown that had been picking well.
Handling and keeping what you have cut
The stalks wilt fast because they are hollow and lose water from the cut end. Get them into water or into a bag in the fridge within an hour of cutting. Standing the cut ends in an inch (2.5 cm) of cool water in a jar keeps them crisp on a worktop for a day; wrapped in a damp cloth in a sealed box in the fridge they hold for four or five days before the edges go limp.
Wash off the sap before storing, not after. Sap that has dried on the outside of a stalk overnight leaves a stain and a bitter film that no amount of later rinsing removes. A quick rinse under cool running water at harvest, followed by a shake and a dry, is all that is needed.
For longer keeping, strip the leaflets from the stalk and dry them at low heat with good airflow until they crumble, or blanch briefly and freeze them flat. Both concentrate the flavor considerably, so use less than you would fresh.
Record the date of your first cut each spring and roughly how many stalks you take per week per plant, along with the date growth visibly slowed. Over two seasons that tells you the exact rate your particular plants sustain, which is more useful than any general rule.