What type of fertilizer for seedlings?
I am growing several types of seedlings under lights (onions, pansies, lavender, coleus, impatiens, tomatoes, broccoli, kale, zinnia, bachelor buttons, etc.). I bought some MiracleGro Tomato fertilizer with 18:18:21 ratio last year and was wondering if I can use this for when the first true leaves start appearing on these seedlings. Can I use this and just dilute it to 1/2 or 1/4, or would a different ratio be better? How often should I use fertilizer?