She's fading in late flower. Do I flush, feed or pull the leaves?

GROWER ANSWER

Usually none of the three. When the old fan leaves yellow, crisp and drop in the last 2 to 3 weeks before harvest, she's not dying. She's finishing. She's pulling what she stored in those old leaves back out and moving it up into the flowers. It looks dramatic, and it's on purpose. The way you protect her now is to stop trying to rescue her.

Take your hands off the plant and put them on the room.

Why a late fade happens

Earlier in the grow she banked nutrients in her older leaves. Late in flower her roots take up less while the flowers are still filling, so she draws on that bank. The green breaks down, the leaf yellows, crisps and drops. The bank only helps cover that stretch. It doesn't replace feeding, and it only holds what can move: nitrogen, potassium and magnesium can come back out of a leaf, calcium can't.

Think of a fruit tree letting its leaves go while the fruit finishes. Ugly, and normal.

Normal fade or a problem?

A normal fade starts low, on the oldest leaves first, and moves slowly and evenly up the plant. The tops stay full, the small leaves around the flowers mostly hold, and it takes its time. That's ripening, not an emergency.

A problem looks faster, uglier and less picky:

• the newest top growth, or the small leaves around the flowers, suddenly burning or spotting;

• blotchy brown or black patches instead of a clean yellow;

• the whole plant crashing over a day or two.

That's the one you slow down and look at closely. In soil, check your runoff before you add anything. You generally want the root zone around 6.2 to 6.8 pH. If the reading is well outside that, you may be looking at a lockout or buildup rather than a simple fade.

The three moves that feel responsible and cost you

1. The hard flush. Days of plain water because one leaf looks scary or one runoff number came back high is a whole program swing in an afternoon. Flushing early can also starve her while she's still filling out. If you feed bottled nutrients and want to taper toward the end, a planned, gentle ease-down is fine. If runoff confirms a buildup, the fix is small: plain pH'd water or a very light feed, half strength or less, for a watering or two.

2. Stripping the yellow leaves. A yellowing fan leaf is still sending its stored food into the finish. Pull it and you throw that support away and add a fresh stress with no time left to recover. Take only what's fully dead and comes off easy, or what's trapping moisture against a flower.

3. A late booster, PK or cal-mag. Uptake is winding down. Extra salts this late are mostly salts she can't use. They raise the strength at the roots, raise the odds of tip burn or lockout, and stress her when she can least handle it. A normal fade isn't a deficiency to fix.

To a finishing plant, all three read the same: a sudden change she can't adapt to. This late, stress doesn't turn into more weight. It turns into stalled ripening and a weaker finish.

The one thing you don't leave alone: rot

Dense flowers, still air and high humidity are what rot loves. Gray, brown or mushy spots down inside a dense flower, or a leaf that dies suddenly and pulls out too easily, earn one small, targeted move. Don't spray it. Cut the affected part out cleanly, get it out of the room, check the flowers nearby, and bring the humidity down.

What protects the finish

• Humidity down into roughly 40 to 50%.

• Gentle air across the whole canopy, not one top getting blasted while a pocket sits stale.

• Steady temperature, running the cooler side of the flower range, about 72 to 76°F, with no big swings.

• Steady light and support for the heavy branches, so they don't flop into each other.

Then leave her alone. The last two weeks don't reward the busiest grower. They reward the calmest one.

When it's something else

• Deciding when to cut: see New England harvest decision guide

• Gray fuzz or mush inside the flowers: see Bud rot survival guide

• A high runoff number and you're tempted to flush: see My runoff number is high. Should I flush?

• Yellow leaves earlier in the grow: see Yellow leaves: is it a deficiency, and is this too much?

Keep going

Watch the episode: Fan Leaves Yellowing Before Harvest? Don't Panic-Feed Her on MyRemy Live.

Watch the episode: Yellow Leaves in Late Flower? It's Not Dying, It's Finishing on MyRemy Live.

Late flower is a race she's already winning. Your only job is to not trip her at the line. The whole system is written down in the free Stability Playbook. Get the free Stability Playbook

More answers: all grow guides. Every shelf guide and maker feed chart: Grower Resources.