Answer: Usually, the reason for spindly plants is lack of light. Most gardeners find it necessary to use supplemental light when starting seeds indoors. One "warm" bulb and one "cool" bulb in a fluorescent shop light works well. Keep the lights on 16 hours a day and keep the plants just an inch or two below the bulbs. Other possible causes would be too high a temperature (pansies like it cool) or lack of nutrients (use a water soluble fertilizer at a very dilute rate after true leaves appear). I hope this helps you trouble shoot.
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