What is "hardening off" in plant cultivation?

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"Hardening off" refers to the process of gradually acclimating plants to outdoor conditions after they have been grown indoors or in controlled environments. This transition is essential for ensuring that the plants can withstand the harsher elements they will face outside, such as temperature fluctuations, wind, and direct sunlight.

During the hardening-off phase, plants are typically exposed to outdoor conditions for increasing lengths of time over a period of several days to weeks. This practice helps reduce transplant shock and increases the chances of survival and healthy growth once the plants are finally planted in the garden or in their permanent outdoor locations.

The other options do not accurately define hardening off. Watering plants more frequently pertains to their hydration needs rather than acclimatization. Pruning is focused on shaping the plants and does not involve outdoor exposure. Planting in larger containers relates to growth space and root development but does not involve the adjustment to outside conditions.

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