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Hardening Off Seedlings: The 10-Day Transition to Outdoors

Day 13: Indoor seedlings need gradual exposure before transplanting. Here's the schedule.

Days 1–2

Sheltered shade, warmest part of day, 2–3 hours only.

Days 3–4

Introduce 2 hours direct sun + light breeze. Late morning to early afternoon. Monitor soil moisture closely.

Day 5

Most of day in sun, but bring in at night. No temps below 50°F.

Day 7

Overnight outside if frost-free.

Days 7–10

Ready to transplant. Choose cloudy day. Pre-hydrate soil.

Rushing this kills seedlings. Patience = survival.

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