Increase exposure gradually and let conditions guide the pace.
Understand the change
Indoor seedlings have grown in a comparatively sheltered environment. Outdoor sunlight, wind, and temperature swings can be a shock. Hardening off is the gradual adjustment before transplanting. It does not make a frost-tender crop able to tolerate freezing conditions.
Begin in a sheltered place
Choose a mild day and start with limited exposure in a protected spot, following crop-specific extension advice. Gradually increase time and exposure over roughly a week or more as conditions allow. Strong wind, harsh sun, or unexpectedly cold weather may require stepping back rather than pressing ahead to meet a fixed date.
Keep checking the growing mix
Small pots can dry quickly outdoors. Inspect moisture and water appropriately while maintaining drainage. Do not deliberately wilt the plants to toughen them. Watch for pale or scorched foliage and use those observations to adjust the exposure, not to add fertilizer without a diagnosis.
Transplant when the site is ready
Check crop timing, soil conditions, and the forecast. Have supports and water ready before removing plants from their pots. Follow guidance for the particular crop on planting depth; a technique used for tomatoes is not universal. Label the variety and date so you can compare establishment next season.
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Open the planning tool ↗Sources & further reading
These extension resources support the growing principles in this guide. Our examples and planning suggestions are editorial explanations. Local recommendations take priority where conditions differ.
Reviewed September 26, 2026. Read our editorial approach.
