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hi @Mañ'O'Green , Its a nightmare when it goes above 29oC eh.... I also run lamps at night 20/4. So they only get 4 hours 12 to 4 pm in dark. Today they were OK but dreading Thursday and Friday..... might bring them downstairs for the PM if it goes above 32oC in there this week, thankfully autos are a little more forgiving on light schedules. I have a conservatory which is out of the full sun by midday so they could get on better in there during the intenser days.... last resort if I have to.
I contacted seed-bank for recommends on heat tolerant strains and they said Auto Extreme is fairly hardy and shd cope with up to 36oC. Today it got to 30oC in there when lamps went back on... but they have plenty of cool air blowing directly on them. Might invest in a leaf temp metre. I would love it if they doubled in size, tripled wd be a miracle
I keep thinking they will die off after 65 days since they are meant to go from seed to harvest in that time. I added some Bat Guano last week to top of pots, they loved that, will feed that weekly from now on with their nutes. I have just started with top max and very minimal bloom..... but read that I should leave out the bloom nutes until they are in full flower as it will force growth to stop..... atm they are getting Seaweed (maxi crop) Biobizz Veg, and BioBizz Topmax.... as well as calmag and potsil. Watering twice daily now as they are drinking loads. Nutes at 3/4 of recommended as don't want to overfeed.
I have two of the Fast to Vasts... the picture is of the bigger of the two. Gave them both a defoliate today.... they are still stretching. I will get some B1, nit heard of that before. I am currently using Potsil which is meant to help build cell walls and help with heat stress. I have grown photos up there with no issues in summer ... but that was abt 10 years ago...Seems we are getting warmer summers these days. Roll on autumn, winter and spring, much easier to control the environment
The newbies today are 6 days old and already have the seed leaves, and 4 big leaves and have doubled in size...... I have a feeling the Extremes could be monsters! Really hope they are as hardy as supplier says. Thanks for your advice and for reading my post