Answer: When you start seeds for the first time, it can be kind of startling how small these babies look. The typical head-start for flowers is 6 to 8 weeks; 12 weeks would be about the maximum. If you try to keep them longer than that indoors, they may become potbound or get leggy (though some flower seedlings, such as petunias, benefit from pinching back that helps them form dense, bushy growth). Do you have your seedling flats under fluorescent lights? Light and judicious fertilization should help them become sturdy and ready for transplant within the recommended time period. They may look small, but once they have become acclimated to the garden, they will grow quickly.
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