Saturday, October 23, 2010

Off to a good start

Several seedlings, that had just developed their first true leaves, were placed in my new grow chamber when I launched it on October 18, 2010. It has only been five days since they were placed in the chamber, and to say that I am perfectly satisfied with the results would be an understatement.

My primary concern was that the heat from the lighting would raise the temperature in the grow chamber above eighty degrees making lettuce cultivation difficult. The rear access port, although admittedly an afterthought, has worked perfectly in cooling the chamber. I have been monitoring the temperature and humidity daily, and the temperature has averaged seventy degrees during the photoperiod, with drop of about ten degrees at night. The humidity has averaged forty percent.

The plant in the above photo is a baby romaine lettuce; and it should be evident that it is a compact and healthy specimen for a plant being grown indoors. The seeds were marketed by Livingston Seed Company, and there is very little information regarding the variety on the seed package. As I recall, the seeds cost little more than a dollar, and there were a lot of seeds in the package. So, I guess I will have to grow them and make my own determination about this cultivar.

At this point is appears that the grow chamber is going to be worth the effort that I put into constructing it.


Andrew said...

While growing lettuce, what do you keep your pH at? and what ppm's do you keep your nutrient solution at? do you consistently keep your ppm's the same or raise them slightly as the plant matures? I am running a ebb-n-flow system under T5's right now and want to get a crop of lettuce in the garden for winter

admin said...

I try to keep the pH at 6.5 to 7 and the ppm at 400 to 800. I have three systems and move plants to another system with a slightly higher ppm as they mature. Also, I change the nutrients about every two weeks. Good luck.