The water helps to moderate the temperatures. I like the cow manure you get a stone's throw away. Bless your mom, to make it 90 years and still going strong. Chicken pot pie sounds good too. I have no tomatoes now because I had yellow leaf curl virus and had to pull my two tomatoes out. I planted beans and peas instead. I might try another tomato and see what happens. I am not seeing white flies now. After I pull the bean and peas, I might try another variety. I planted zucchini and cucumbers in my two other pots. They are starting to flower now. I might try some beets in one of the other pots. My main garden has been fallow for most of the year. All I have done is take the weeds out. There was a lot of weeds.
Happy gardening in Hawaii. Gardens are where people grow.