What is your Max / Min temperature in the GREENHOUSE?

[Stuart]

Scorch damage is fairly instant, if plants look OK after the last two days they should be alright.

Stuart

[Jim_Mercer]

Only got to 46.1°C today so a bit lower than July's maximum but there is always tomorrow

[RachelTurner]

Well I don't have a greenhouse. Most of my plants are on the windowsill in my bedroom/home office which is roughly north-facing. Temperature high yesterday was 31.5°C with a relative humidity of 34%. That was with all the windows open (outside temperature high was 30.4°C) and three fans running all day, partly for the benefit of the human inhabitant, and partly for the plants. My Rhipsalis baccifera (mistletoe cactus) which sits on top of a terracotta saucer filled with pebbles and water, so it's not standing in the water, but to raise the local RH was evaporating that quickly that I refilled the saucer three times. The low last night was 29.4°C and RH 33%. The bedroom only has one external wall, and once it's hot in there it stays hot for days. I'd only just got the temperature in there down to something like normal after the last heatwave.

My echeverias and cacti are on the landing window, which is west-facing. The highest daytime temperature yesterday was 34.7°C. All of the upstairs windows were open to try and get the breeze from outside to blow some of the heat out, which wasn't working particularly well. I ended up using a stick-on car window shade on the landing window to try and lower the temperature a bit.

Closest town: Chesterfield, Derbyshire.

[Chris L]

It seems to have been a lot more humid than the other week. I think it has been hot for longer too.

Makes me realise how (several years ago) working in these temps indoors in a pretty much sealed environment day in day out for most of the summer was most likely making me ill.