I made a kelp meal tea just letting 3 tablespoons of kelp meal sit in a gallon of rain water for 4-5 days. I filtered the tea then diluted the spray to equal about 1 tablespoon per gallon to use as a foliar spray for my Outdoor plants. Do I have the right amounts for a foliar spray or should I dilute it more? I have always used maxicrop kelp extract to foliar feed but I want to start making my own. How long will this kelp tea be good for before it's no longer useful as a foliar spray? Thanks for any help.