30-10-10 is probably too much nitrogen (first number), that make plants droop because roots are doing this reverse osmosis thing where they are actually drawing water out of the plant. Either your plants do not need any fertilizer or try a 20-20-20 at 1/8 strength in about 2 weeks after flushing real well. Overwatering can also look this way, so do not be fooled if limp after flushing, you can drown the roots and it could take 2 weeks to recover