your soil sounds kinda 'hot' for young seedlings, and I have to ask "WHY are you saying you will be feeding frequently?" ... you should only feed your plants when they NEED feeding ... sounds like you are 'over-loving' your plants ... in nature, the seed drops to the ground, goes thru a winter, finally roots, sprouts and grows ... and, all without help from 'Man' ... more plants are ruined by 'too much' , than 'not enough' ... you need to backup a step, start your seeds in mild potting soil ... do NOT add ferts for at least two weeks, the seedling has all it needs in the cotyldons (the first rounded little 'leaves') ... once the plants are several inches tall, you can transplant into larger pots, with your rich soil ... with the soil mixture you describe, you shouldn't have to add ANY nutes before flowering, anyway ... you can start your Bloom nutes a few days before switching your lamp to a flowering 12/12 schedule ... molasses is a good additive, but it is NOT a nutrient fertilizer .. you can use your Bloom nutes right up till 2 weeks before flushing, for harvest ... most sativa-dominants are NOT heavy feeders, either ... good luck :smokin: