Answer: Pansies are very cold tolerant and can be transplanted outdoors before the last frost, but they must be carefully conditioned before you do it. Conditioning or acclimating requires that they be gradually exposed to the weather, either by being placed in a cold frame or other protected spot and then slowly exposed to more and more actual sun, wind, and cold. This process can take about ten days or more, especially if it is still quite cold. Keep in mind too that tey will also grow more slowly under the colder conditions.
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