Been growing NFT for many years. 1st time I've experienced this. Was doing housekeeping and noticed lots of dry deal leaves at the bottom of the canopy - not that unusual, then started noticing leaves that are wilted and black tipped and soft, all lower in the canopy.
Then noticed a couple of branches that the small buds have shrivelled up. ALL the big buds a the top are all OK.
Roots looo fairly normal with the exception a fair few of the bases look like their roots have torn off.
I've chucked in 5litres of water with 1 cup of 5% Hydrogen peroxide in case I have root root. Pics below.
I would add - the NFT water flow was backing up and the top half of the tank was a couple of cm deep and the roots were totally submerged. The top two plants are the ones with dead buds/branches and VERY under developed roots compared to the bottom four plants- though the leaf problem is throughout. I've cleared a blockage of roots at the bottom and reduced the pump flow. I wonder if I've drowned the roots ? You can see the difference in roots on the 2nd pic - from flooded on the left, to less so on the right.
Then noticed a couple of branches that the small buds have shrivelled up. ALL the big buds a the top are all OK.
Roots looo fairly normal with the exception a fair few of the bases look like their roots have torn off.
I've chucked in 5litres of water with 1 cup of 5% Hydrogen peroxide in case I have root root. Pics below.
I would add - the NFT water flow was backing up and the top half of the tank was a couple of cm deep and the roots were totally submerged. The top two plants are the ones with dead buds/branches and VERY under developed roots compared to the bottom four plants- though the leaf problem is throughout. I've cleared a blockage of roots at the bottom and reduced the pump flow. I wonder if I've drowned the roots ? You can see the difference in roots on the 2nd pic - from flooded on the left, to less so on the right.
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