If these were my plants, I'd upgrade the pot sizes to 5gal---I'd buy some magcal and I'd water 1gal today, and then in 2 days I'd follow up with a half gal, then 2 days later I'd follow back with 1 gal--and watch the growth and make sure the plant likes the water that its being given. If it wants more, give it more but keep in mind, a larger pot size will allow you to feed it 1gal water every 2 days and not get so water logged because it has plenty of soil appose to your 1gal pot size right now.