Yup, exactly- it is too rich for a young seedling. Happy Frog or a cheap seed starting mix from a nursery are much better for seedlings, which don't need ANY added nutes at first.

Transplanting a rooted clone into a pre-fertilized soil, I'd use caution. If the clone was rooted in a plug or peat pellet, or even right into seedling mix or promix, I wouldn't worry about it. If the clone was rooted in a bubbler/DWC/aero type cloner, I'd first plant it into seedling starting or promix and then when it is starting vertical growth, transplant NEXT into the FFOF.
Hope that helps?
stinkyattic Reviewed by stinkyattic on . White Rhino YELLOWING LEAVES Naturally I am a little worried, so I decided to post this, in hopes of some feedback. Have 4 White Rhino ladies.....soil grow w/ 400w HPS in my walk-in closet. Started flowering.....and the first oddity I noticed is it tool a good 2 weeks for pestils to show on a 12/12 cycle (from 20/4) which is longer than any strain I have ever grown. Used FoxFarm Open Sesame (1 tsp to a gallon every other watering) and water every other day, 1 1/2 gallons for 4 plants. Everythiong seemed great. Last week Rating: 5