I was just going to say...I never foliar feed! I keep it simple, less chance for problems. For seedlings I go with the basic peat/perlite mix 30% perlite. Mix in 3 Tablespoons of your choice of dry nutes per gallon of soil. Alfalfa, kelp, chicken, fish meal, etc. Maybe one of each. Then plain watering for 3 weeks.
You can add 3 % worm casting into the mix, 5-10% compost, that's all I do. Every few waterings a half-tablespoon of molasses per gallon of water. None of this will burn them. Seedlings don't need much fertilizer, for the couple sets of leaves they rely on the nutrients in the seed.