60-40 top soil and compost...? No added perlite...? Topsoil is too hot, compost is usually too acidic, and there's no aeration. Do you have access to a good potting soil?

The Schultz nutes you mention are for flowering, not vegetative growth. You'll want to get a veg nute, for the vegetative stage, and save what you have for flowering. In a perfect world, I'd recommend purchasing a Fox Farms or Canna products regimine. One bottle of veg nutes for the veg stage, one bottle of flower nutes for the flowering stage, and a micronute to be added regularly throughout the grow.

Would get the potting soil now, and plant some more seeds, as she's possibly crashing. You can either try and save her thru transplanting and some excessive TLC, or start again when you have the proper supplies.

Do you have a ph pen, or some way to check run-off water?