Hi guys,
I've been growing for over 20 years and up until 12 mths ago, had no issues and was able to identify issues with my plants.
Last year I moved interstate and got my little tent up and running again, I have had nothing but trouble since, my seeds sprout, grow for a few weeks and then go yellow, this is the third lot of seeds and I really can't lose these ones so I'm hoping some expertise from you guys may help! Details of the grow are below as well as pics.
Lighting: Platinum P300 LED grow light (on veg mode only at the moment- about 85w) and a diy Vero 29 cob with solskin strips on either side, pushes 98w.
Tent: 60cm x 60xm x 1.6m
Air movement: 6 inch inline exhaust fan
Temps: lights on is 23-25 degrees Celsius, lights off, 15-17 degrees.
Soil: purchased organic tomato soil that has manure, blood n bone and some other goodies, my tomatoes love it! It may be that it needs Perlite or vermiculite to make it separated.
Additives: Sprinkled some gypsum on top and they have been given great white mycos
Watering: every 4-5 days on average and I soak the medium then let it dry out.
Soil pH is 6.8.
Tap water is 7.6. I haven't tested runoff as yet but will do so tomorrow when I get a new pH pen.
So I put the issues down to overwatering as looking at the seedlings, they curl down and are yellowing. I'm now wondering if it could be my tap water pH being too high but my soil pH is staying the same...I'm stumped!
Some pics, these seedlings are about 3 weeks old so are definitely stunted. The only dark green one in the first pic popped up 2 days ago. Thanks guys!
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