Gadenin日本語Get the appDamping off is the one that takes whole trays
A stand of pea shoots is the ideal setup for damping off: a dense mat of soft seedlings, a permanently damp compost surface, no air moving at the base, and often a warm room. The fungi responsible attack at the collar, right where stem meets compost. You see a few shoots keel over with a pinched, water-soaked brown band at the base, and within two days a patch the size of your palm has gone down flat.
It moves outward from a center, so if you catch it at the first few plants you can sometimes save the rest. Pull out the collapsed shoots and everything touching them, get the surface as dry as you can manage, and move the tray somewhere with real air movement. If the patch is already bigger than a hand, cut whatever is still standing and eat it, then throw the block out.
Prevention is mostly mechanical. Use fresh compost rather than the remains of the last tray, water from below, and never leave the tray covered after the shoots have emerged. Reusing an unwashed tray is a common route in; a rinse in hot soapy water between sowings is enough.
Powdery mildew arrives when the stand gets crowded and dry
Peas are prone to powdery mildew, and although a fourteen-day crop usually gets cut before it shows, a tray you are taking a third cut from is fully old enough to get it. It appears as a dusty white bloom on the upper surface of the leaves, quite unlike the cobwebby gray growth of damping off at the base.
The trigger is a plant under water stress in still, warm air, which is exactly what a tray that has been cut twice and left to dry out becomes. Shoots with mildew are safe to eat if you want to rinse them, but they taste musty and the stand will not recover in any useful way. Cut what is clean, clear the rest and start again.
The practical control is turnover. Keep the sowing interval short enough that no tray sits around long enough to get old, and give the trays some space rather than lining them shoulder to shoulder along the sill.
| Symptom | Where it shows | Likely cause | Action |
|---|---|---|---|
| Shoots keel over with a brown pinched base | At compost level | Damping off | Remove the patch, dry the surface, add airflow |
| Gray cobweb growth among the stumps | Base of a cut stand | Wet surface, poor air | Cut the crop now and clear the tray |
| Dusty white bloom on the leaves | Upper leaf surfaces | Powdery mildew | Take the clean cut, then resow |
| Peas dug up, seed shells left behind | Compost surface | Mice or birds | Cover with mesh until the shoots are 2 in tall |
| Tiny holes shot through young leaves | New growth outdoors | Leaf-eating beetles or slugs | Row cover the band, check under the tray at night |
Mice and birds take the seed before you ever see a shoot
A tray or band sown with soaked peas is a concentrated, easily located meal, and mice find it within a night or two. The signature is unmistakable: neat holes in the compost, empty seed coats scattered on the surface, and a stand that comes up in patches for no apparent reason.
Cover any outdoor sowing with fine mesh or a cloche from the moment you sow until the shoots are two inches (5 cm) tall and no longer worth digging for. Indoors, keep trays off the floor and away from anywhere a mouse can climb to. Birds go for the emerging shoots rather than the seed, so the same mesh handles both.
If a whole outdoor band fails to come up, dig into it before you blame the seed. Rotted peas are soft, gray and still in place. Peas taken by mice leave holes and empty coats. Those two failures need completely different fixes, and you cannot tell them apart from the surface.
Knowing when to give up, and what to write down
The economics of this crop are different from anything else in the garden. A tray costs a couple of weeks and a handful of dried peas, so nursing a sick one is almost never the right call. If more than about a quarter of the stand is down, or if there is white fuzz anywhere among the stumps after a cut, take whatever clean growth you can eat today and clear the block. A fresh sowing is fourteen days from the bowl.
The single most useful record here is the interval between sowings and what went wrong with each one. Note the date, where the tray stood, whether the compost was fresh or reused, and the reason you cleared it. Damping off that keeps coming back in the same spot on the same sill points at the position, not at your technique, and that pattern is invisible unless the failures are written down next to each other.