Collard green BIIG |
Tomato and pepper seedlings |
During the start up of the system, the pH decreased once nitrification was efficient, but the pH increased after that, since there was no source of additional ammonia. I therefore started to add some ammonia, which keeps the pH around 7 as it is alkaline. A few weeks ago I increase the amount of ammonia I add so in the last week, I didnt add any as ammonia was building up in the water. In consequence, the pH has dropped a bit.
I have started to measure leaf length and leaf number, and overall, leaf number has increased in each plant, leaf length has increased a bit, but has stopped for some. I suppose it reached its optimal length.
I guess things are "growing forward" and the 2 collard greens are getting quite sizable (at least bigger than I expected).
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