Plant natives now, seed them in December

Most people think about planting in April. By April the soil is cold, wet, and three weeks from being workable, and everything you put in has to grow roots and leaves at the same time while the weather warms up around it.

Fall is the better half of the year for this, and there are two windows in it. They do not overlap, and which one you want depends on whether you are holding a pot or a bag.

Potted plants go in now

Soil around here stays warm well after the air stops feeling like it. Roots keep growing until the ground gets down to about forty degrees, which in a normal year is most of October.

That is the whole advantage. A plant put in now is dormant on top and busy underneath. It is not trying to hold up flowers or push new leaves. Every bit of what it has goes into roots, and it goes into roots in soil that is already warm instead of soil that is still thawing.

What you need is four to six weeks of root growth before the ground freezes hard. Around Lake Minnetonka that means getting plants in by roughly the middle of October. Later than that and the roots never really grip, and the first hard freeze-thaw cycle lifts the whole plug out of the ground. You come back in April to find it sitting on the surface with its roots in the air.

Then keep watering, which nobody does

This is where fall plantings actually fail. It is fifty degrees and grey, nothing looks thirsty, so the hose gets put away in early October.

The plant is still growing roots. It needs water until the ground freezes, not until the weather turns. Not much and not often — but do not stop because it got cool out.

Mulch after it freezes, not before

The instinct is to mulch a new planting right away to protect it. Do that on warm ground in October and you have built a heated shelter for voles, and they will spend the winter eating the crowns.

Wait until the ground has actually frozen, then mulch. The job of that mulch is not to keep the plant warm. It is to keep the ground consistently frozen so it does not thaw and refreeze and heave your plants out.

Seed waits for the cold

Seed is the other window and it is the opposite instruction.

A lot of native seed needs a cold, moist period before it will germinate at all. That is not a defect — it is the seed refusing to sprout in the autumn of the year it dropped, which would kill it. Winter is the mechanism.

So native seed goes down late, after the ground is cold enough that nothing can come up. Late November into December here, often onto frozen bare ground or a light snow. It sits there all winter getting exactly the treatment it is waiting for, and comes up on its own schedule in spring.

Try to do that in April and you are either buying seed somebody else has already chilled or accepting that a good share of it will do nothing the first year.

One thing not to bring over from the lawn

If you have seeded a lawn you know the routine: seed, starter fertilizer, water. It works, and we do it that way.

Do not do it here. Fertilizer on a native planting feeds the weed seed that is already in that soil, and weeds are faster than natives by a wide margin. The natives are slow on purpose — first year they sleep, second year they creep, third year they leap — and the whole first season is them building root while something faster tries to take the light.

Feeding that competition is how a native bed turns into a weed bed in one year. Bare soil, right plant for the conditions, water, patience. That is the recipe.

We do this at a small scale — a rain garden, a shoreline buffer, one bed at a time. It is not prairie restoration on acreage and we do not pretend otherwise. But the timing is the same either way, and the timing is most of it.

If you are looking at a spot and thinking about spring: the better move is usually to put plants in this month and let the winter do the rest.