We have discussed protected growing environment issues, like water , mulch, ventilation and area, here is some figures from the end of a hot day , mid June at 18h in the evening.
Last watering 20 hours ago and under the grass mulch it's still moist.(Total area 100sqm).
Amount of water given 220l by watering can.
Daytime temperature 30 degrees Celsius.
Temperature now inside the tunnel 28 degrees.
Temperature outside only two or three degrees less.
Conditions of tomato plants, slightly wilting.
Soil temperature 23 degrees .
I would consider this to be adverage in all aspects, and the performance of the environment, to me , seems good. No disease, or pests and steady uniform growth, could be a little more advanced in growth, but the plants were small when planted and it was quite late (21 days ago)up to the last frost date.