I’ve been asked a couple times lately do I follow a watering schedule and / or what is my watering schedule.
I do not actually follow a schedule and let the plants tell me what to do. In the case of the plants in the backyard, I simply look at them every day and if they look droopy I give them a good soak. In the case of the plants at the community garden, I do not see them every day and need to exercise a little bit of judgment mostly by keeping an eye on the weather. If it has been rainy or mild, I am comfortable leaving them for a few days. If, however, it is pounding hot, I will increase the frequency of my checks, but use the same rule of thumb regarding how rigid or droopy the plants are. Additionally, not all plants require the same amount of water (e.g. tomatoes need less, cucumbers need more) and will only water the sections that need it.
Some other general watering advice:
Early morning or late afternoon are best. Mid day allows most of the water to evaporate off in the heat. Night watering promotes fungus.
Water the base of the plant and avoid watering the leaves directly.
Less frequent, heavy watering promotes deep roots.
Frequent, short watering promotes shallow roots. Deep roots are better.
Use mulch (straw, newspapers, ground tree bark, old grass clippings) around the base of the plants to keep down weeds and keep moisture in.