Answer: Most gardeners start seeds indoors to get a jump-start on the growing season. This is especially useful when you're planning to grow crops that require a long season to mature. Sweetpeas are cool-season plants and the seeds don't mind germinatingin cool soils, but the seedlings do mind if you disturb their roots. So, to be on the safe side, sow your sweetpea seeds directly in the ground about two weeks before your last frost of the season. Nasturtiums are relatively tolerant of the cold, too, soyou can plant them outdoors two weeks after you've planted your sweetpeas. Or, you can start them indoors now and set them outside in about four weeks.
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