Lollipopping an outdoor plant

What it is

Clearing the lower growth (small branches, thin stems, and the popcorn buds they'd have produced) so the plant puts what it has into the top sites that actually get light. What's left is a bare lower stem under a full canopy, which is where the name comes from.

It is not defoliation. Defoliation removes leaves; lollipopping removes whole lower branches at the stem. They're often done in the same few weeks and they stack into a real setback if you do both at once, see defoliation without stalling the plant.

Why bother

The bottom is a bad investment. Growth down there gets a fraction of the light the top does, and it produces small, airy, loose buds ("larf"). The plant spends resources building it anyway, and you spend an evening trimming it in October for very little back.

Airflow at the base. This is the one that matters most in a wet yard. Dense lower growth sitting close to damp ground holds humidity exactly where you don't want it, and stagnant, humid air at the base of a plant in September is how bud rot gets started.

Less splash-back. Rain hitting bare soil throws it onto low leaves, and soil-borne disease travels that way. An open lower stem gives it nothing to land on.

When

The window is the flip and the first two to three weeks of flower. Just before the flip is the cleanest time. The plant still has the vigor to shrug it off, and it hasn't yet spent anything on flower sites you're about to cut off.

After about week three of flower, stop. By then the plant has invested in those sites, and removing them is pure loss plus a recovery period you can't afford in a short season. If you missed the window, leave it and trim the larf at harvest instead. That's a worse outcome than doing it on time, and a much better outcome than doing it late.

How much, and why less outdoors

Most lollipopping advice is written for indoor grows, where a single fixture hangs above the canopy and everything below the top eight inches genuinely sits in the dark. Under those conditions, stripping the bottom third or more is right.

Outdoors the sun moves. It comes in low in the morning and evening and at an angle for most of the day, so lower branches, particularly on the south and west sides, get real, usable light that an indoor plant's lower branches never see. Strip an outdoor plant like an indoor one and you'll remove sites that would have finished perfectly well.

A workable approach:

• Start at the bottom third as an upper limit, not a target.
• Use the reach test instead of a fixed fraction. Look at where each lower branch tip ends up. If it can't reach within roughly a foot of the main canopy, it's never going to compete for light, take it. If it's close, leave it.
• Walk around the plant before cutting. The shaded north side will need more taken off than the south side. There's no reason the cut line has to be level all the way around, and on an outdoor plant it usually shouldn't be.
• When in doubt, leave it. You can take more next week. You can't put a branch back.

Doing it

Sharp, clean snips, and cut close to the main stem rather than leaving stubs. A stub is a wound that doesn't heal cleanly and a place for rot to sit.

Take whole branches, not just their leaves. Removing the leaves and leaving the twig behind is the worst of both: the plant still feeds the site, and you've taken the solar panels that were paying for it.

Work bottom-up and stop while you still think you could take more. Then leave the plant alone for a week before doing anything else structural to it: no defoliation, no training, no heavy feed changes in the same session.

Signs you took too much

No new growth for five to ten days, sometimes with yellowing at the leaf margins as the plant reallocates. It recovers on its own, but it costs you time you don't have in a short season, and it's the same stall you'd get from over-defoliating.

Two exceptions

Autoflowers. They run on a fixed clock and can't make up lost time, so heavy lollipopping is a bad trade. Take the obvious dead-end growth at the very bottom and leave the rest.

Small or slow plants. A plant that never got big enough to shade its own bottom doesn't have a light problem to solve. Lollipopping is a fix for dense lower growth, not a step every plant needs.