Hi there. This is my first grow and first forum post so please forgive me if I get something wrong. Corrections and any assistance is most welcome of course.
Background - I am growing due to a need for quality buds to make RSO for my wife who has stage 4 cancer which we have been told is no longer treatable. I am therefore 100% committed to making this work.
Setup - I have a 1.2m x 1.2m x 1.9m (4x4x7ft) grow tent with 2 x VIPARSPECTRA Reflector-Series 600W LED Grow Lights. The growing method I am using is what I believe is called top fed DWC (bubbleponics).
Grow - I soaked the seeds in ph’d water for 6 hours and then put them into rapid rooters (the rapid rooters were already in the net pots and the top fed water had been running through for a couple of days to regularise the PH levels). I planted 5 seeds thinking one may fail but all 5 seeds germinated and sprouted their first leaves all healthy. Second set of leaves (proper ones) came and all was well at first then they started going yellow.
I have kept the PH between 5.7 and 6.4 mainly about the 6.0-6.2 range. I have been looking at my notes and doing some research and come up with four possible causes which could coincide with the yellowing.
1 - Up until now I had used no nutes.
2 - The grow room temp dropped to 19degc for about 36 hours
3 - LED lights were at 26 inches from plants
4 - too much water.
5 - Water temp is around the 20-22 deg c
I have therefore:
1 - I have added a small amount of nutes (I believe less is more as it were in the early stages)
2 - Corrected the problem and the temp is now stable at 22-26 deg c
3 - I have moved the LED lights up to 36" from plants
4 - I have moved the top feed pipes so that they are not on the rapid rooters so much
5 - I am still working on this. open to ideas.
Can any one give me any other pointers? any help would be terrific.
I am sure I have missed some valuable info you need in order to answer me and if this is the case please just ask and I will provide it.
I have a couple of pics to share however can’t currently find how to add them to this post at the moment.