day one of WEEK TWO:
Growth: Plant is now a total of 1 and 5/8″ tall. Plant has grown a little over 3/4″ in two days!
Water Temperature: 75.1 degrees Fahrenheit
pH Level: 7.3
After Class (the changes we made to our system, if any):
Water Temperature: 73 degrees Fahrenheit
pH Level: 5.6
Here are a few pictures of our plant’s growth:
Here is a bit clearer picture of our plant’s growth:
Notes and Other Thoughts:
In the last post I said I would comment on the type of lighting we are using. We are using a special grow lightbulb that is 400 Watts. It runs on a 12 hour cycle, 12 hours on, 12 hours off.
We seem to be getting very high pH levels. I did a quick search on some hydroponic blogs and also checked out a few websites from a simple google search. I had to filter out some of the material myself, but I have come to several possible theories. (1) There is a possibility that the tap water we used to mix our nutrient solution had a high pH. A pH of 7 is neutral and is somewhat ideal for tapwater, so this may be the reason. (2) In the early growing stages, plants will absorb mainly nitrates which will actually raise the pH levels. I think this too makes a lot of sense. We have seen astounding growth in just two days, and I think it is entirely possible that the plant is making use of these nitrates, which is essentially food for plants. (3) Back to the nutrient solution, if we continue to see such a high pH, I am wondering if we shouldn’t just mix a different batch of solution and pay VERY close attention to the pH. If we could dilute the solution, I imagine that we will be more satisfied with our pH level. I would really like to find an answer soon because I know that high pH levels can cause stress on a plant, and this is the last thing I want to happen to our tiny plant. It needs nutrients and comfortable conditions in order to grow big, healthy, and fully.
I’ll look into it more and keep posting!