Answer: When seedlings are overcrowded they have to compete for moisture, nutrients and sunlight. As a result, they won't be as healthy as they could be. You can thin your seedlings by using scissors to cut the stems of those that are growing too close to others. If you try to pull up the excess seedlings you may uproot them all! Thin so that each plant is about one-half inch from its neighbors on all sides. Continue thinning as the plants grow so the tops are not touching one another.
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