Man those plants look great! Funny just like you, I also transplanted 4 plants from 5 gal pots into15 gallon pots. 5 more will be going in 15 gal pots soon also. The 4 plants are about 3 feet tall and will be vegging
till mid august in this hot so cal sun. I been watering mine every 4 days to give the soil a chance to dry out towards
the middle and lower part of the container. On the 4th day I see a little wilting but all is ok as soon as I give them a good drink.
With this watering the plants are growing at a fast rate and very healthy such as yours. Watering every 4 days seems a bit too long
but it has been working very well for me. Since yours are bigger they will drink more so I would think every other day for watering is good
for your plants. I water as soon as I see the plants wilt a a little to give the roots a chance to reach out and grow looking for
water. Now, I see your plants are in black containers and they will get the soil very hot and dry out your soil quicker and possibly might burn
your roots slowly. My 15 gal pots I picked up at Home Depot and are a very light beige color so the soil gets no heat at all. Much better for a grow then black containers. When my plants were smaller and now I also have some smaller plants in 1 1/2 gal black pots and the black is covered with white paper to keep the container cool. If you have hot sun where your at just touch the black pots in the mid day sun and they will
be very hot to touch enough to burn your hands. This is how hot black pots get in so, cal. Not good at all but if your plants are not in the direct hot sun then your black containers are right. If you do have hot sun hitting your containers I would spray them white or cover them with anything white
to save your soil from overheating, drying out too soon and root rot. Please advise as I would like to know what route you are taking.
