Gadenin日本語Get the appThe cycle overlaps itself, which is why it looks confusing
Because forget-me-not is a biennial that seeds itself, an established colony always has two generations in it at once. The plants flowering in spring are last year's rosettes finishing their lives; the seedlings that germinate a few weeks later are next year's display beginning. Understanding that overlap is the whole of the calendar, because it explains why you are pulling plants and encouraging seedlings in the same bed within the space of a month.
In practice this reduces to two decisions a year. In late spring, as the flowers fade, you decide which plants to pull and which to leave standing for seed. In late summer or early autumn, you decide how many of the resulting seedlings to keep and thin the rest out. Everything else is watching and waiting.
| Season | What the plant is doing | What you do |
|---|---|---|
| Early spring | Rosettes push up coiled flower stems | Nothing. Do not feed or move plants |
| Mid spring | Full flowering, coils unrolling | Note the first flowering date, keep water off the leaves |
| Late spring | Flowers fading, seed setting, mildew starting | Decide: pull most plants, leave two or three for seed |
| Early summer | Seed shed, parent plants dead | Clear debris, rake ground where you want no seedlings |
| Midsummer | Seed germinating in bare ground | Sow deliberately now if starting a new colony |
| Late summer | Seedlings making rosettes | Thin to 6 in (15 cm); water in dry spells |
| Autumn | Rosettes bulking up | Plant bulbs through the patch; move surplus rosettes now |
| Winter | Dormant flat rosettes | Nothing. Do not mulch over the crowns |
Spring: flower, then decide
Spring is entirely hands-off until the flowers begin to fade. Resist the temptation to feed the patch or to move plants that are in the wrong place; both do more harm than the untidiness they are meant to fix. Water only at the roots and only in a genuinely dry spell. The one active job is watching the coiled stem tips, because when the coils have straightened out the flowering is nearly over and your deadline has arrived.
As the color goes, make the decision and act on it within a week or two. Pull the plants you do not want while they are still slightly green and lift them into a bucket rather than carrying them across the bed. Leave the plants you want to seed exactly where you want next year's colony to be, remembering that the seedlings usually appear slightly downhill of the parent. Clear the pulled plants out of the garden rather than composting them, because they carry mildew and viable seed.
- Mark the plants you will keep while the color is still good A short cane beside two or three of the best-placed plants is enough. Once everything is brown it is impossible to tell which was which.
- Pull the rest whole in damp soil Grip low and pull steadily so the shallow root lifts in one piece with the seed heads attached. Cut stumps often push weak second flowering shoots.
- Let the bulb foliage stand Removing the forget-me-nots uncovers the ripening bulb leaves and lets air round them. Leaving the patch to collapse over the bulbs weakens them for next year.
- Brush down clothing and pets away from the beds The seeds carry tiny hooks and travel on sleeves, laces and animal coats. Most stray colonies start this way rather than from wind.
Summer: germination and thinning
Seed shed in early summer germinates in the bare ground within a few weeks, given a little moisture. This is the point at which a new colony should be sown deliberately if you do not have one, aiming for rosettes the size of a saucer by first frost. If you already have a colony, the job is the opposite: pull seedlings out of the paving cracks, the gravel and the pots while they are small, and thin the ones you are keeping.
Thin to six inches (15 cm) apart, which will feel drastic. A mat of touching rosettes going into winter is the direct cause of both crown rot in a wet winter and early mildew the following spring, and thinning is the only measure that reliably prevents either. Water the thinned patch in a dry spell until the plants are established; after that, leave them alone.
Seedlings pulled at this stage compost perfectly well and are the easiest weeding of the year. The same plants left until autumn have real roots and disturb their neighbors when you pull them.
Autumn and winter: the quiet half of the year
Autumn is the moving season. Rosettes lift and replant easily now, so this is when you fill gaps, edge a path or move a colony that has drifted. Plant spring bulbs through the patch with a narrow trowel; the rosettes close over the disturbance within weeks. Keep watering new plantings until autumn rain takes over, then stop. The plants are fully hardy and need no protection in any climate that grows spring bulbs outdoors.
Winter asks for nothing except restraint. Do not mulch over the crowns, do not tidy the rosettes and do not walk on the patch when the ground is soft. The commonest winter loss is not cold but crown rot in a soil that stays saturated, so if a patch fails two winters running the answer is grit and drainage, or a different position, rather than protection.
Keep a one-page record of the cycle
Four dates cover the whole year and are worth writing down every time: first flower open, patch gone over and pulled, first seedlings visible, and rosettes thinned. Add a rough sketch of where the colony was and where you left plants to seed. That single page tells you next year whether the colony is moving, whether it is getting denser or thinner, and whether your pulling date is early or late.
The most useful long-term note is how far the colony has spread from where you started it, measured in paces along a path or from a fixed corner. Forget-me-not almost always spreads further than people expect, and a written distance from three years ago settles the question of whether it is time to pull harder or to let it run.