I am a hobby grower. I do not have an irrigation system. I hand water my pots. I mix 1tsp per gallon of 20-10-20 with every watering and 15-0-15 1tsp once a week. Are these the correct amounts? (everything shows ppm)My pots are 6”, 8” and 10” hanging baskets. Is it good to wet then let dry out? (fear of over watering) We are also experiencing a cooler than normal temp for this time of year. My greenhouse temp at night is dipping down to about 54, is this to cool? I have not started flower initiation yet.