Lighting Concerns For My First Grow

Tango

New Member



Good Day to You All;

Unfortunately it was late in the spring when I decided to give this a try. I purchased feminized seeds online and germinated them in the prescribed manner. Due to my inexperience I managed to get one seedling planted indoors (the one pictured above) and one outside. I will post about the one girl "indoors" which is actually in my tool shed. This seedling was planted June 25th, so about 1 month late. I used an 18" potting container which holds about 47 liters of soil so there should be lots of room for roots. I used a 50/50 mixture of Black Earth and Triple-mix because I have had good success with this mixture in my gardens. The pH is neutral and it is good soil to work with.

My set up is really simple and has cost me practically nothing. I am only interested in growing for personal use and gaining experience. What the heck... it is fun to make things grow and I have always enjoyed doing so. My tool shed is 11' X 9' and 8' in height, so there is ample room for a single plant. Plenty of ventilation and air movement. This is a "Dark Angel" 50% Sativa/Indica blend.

Four weeks later, she is about 6" in height and for all intents and purposes seems to be doing fairly well. Probably better than the tomato plants in my outside garden. I water it every second day being careful not to over water. I use distilled water as our well water has a lot of iron. I may decide later to mix distilled and well water, so any advice on this would be appreciated. Recently, within the past few days, I gently dug around the stem and mixed in some worm castings for some basic nutrients. Not big on chemicals and would rather use organics.

I started off giving the growing area 16 hours of lighting. A couple of days ago when I fertilized I bumped it up to 18 hours of lighting. I have also pruned some lower fan leaves so the plant is not wasting energy with those. I am being a bit cautious here, as I still want the plant to be able to photosynthisize. I plan to cut the lighting period back to 10 hours mid September or maybe the start of September.

Now I will get to what concerns me the most, and where more experienced growers might impart some helpful knowledge.... lighting. I was lucky enough to have a small LED lighting system from my aquarium days. By small I mean one foot square and houses 48 diodes. It is suspended above the growing area on a simple pulley and I try to maintain approximately 20 inches between the lighting and the top of the plant. Of the 48 diodes, 12 are white and the remaining 36 are actinic blue. This worked well for a 65 gallon marine aquarium, and it seems to be working fine for this application as well. I have one of those 3 in 1 meters which will monitor moisture, pH and light. The light scale goes from 0 to 2000. I have absolutely no idea what the numbers on the scale represent. Outside in the shade it reads 500 and in full sun 2000. The meter reading in the grow area is 800. I have researched that the Actinic spectrum of light is very good at the vegetative phase of growing. However, I am concerned this is not proper lighting if and when I can get to the flowering stage. One advantage though, the lighting system has some decent built-in technology. Besides having built-in timing, the actinic blue and white diodes are on separate channels and can be tweaked individually or turned off completely.

My question. If and when I get to the flowering stage, should I turn off the actinic channel and go strictly with the white channel? Should I remove the lighting system completely and suspend a CFL above the plant? Could I turn off the actinic channel and add a red spotlight (which I have)? I am concerned my girl wont flower properly with the present set up. I would also like to see a little more height before I start the flowering stage.

Any tips or suggestions would be appreciated. Thanks for taking the time to read this too. Tango.
 


Here it is at almost 6 weeks from seed. It is now about 10" in height and I see lots of branches where buds will grow. I have pruned 6 of the lower fan leaves over the last week or so. I also changed my mind about fertilizing after doing some research. I have a water soluble 20-20-20 fertilizer which can be used for vegetables and flowers. Mixed as directed (5mL per 1L of water) and gave it a good soaking. I will leave it be for a few days as I don't want to drown it.
I also researched for a new LED on the advice of a member. Since this is my first attempt, and I am working with one plant, I don't need to go overly expensive. Bought a 300W full spectrum LED from Amazon for $115CAN and it should arrive in about another week. It has a "grow" switch and a "flower" switch. The recommended distance between plant and light for this particular unit is 18 inches. I will switch out my old LED and replace with the new one.
Question here: Do I have both switches on during the vegetative phase, then turn off the "grow" switch when I want it to flower? I am not clear on this
As always... any advice on what I am doing is well received and appreciated. For me, growing plants is not rocket science and it has always been an easy equation. Plant seed, water it, give it required light and care for it. However, this is new territory for me and I would like to maximize the yield as much as possible and that is where you folks could impart some wisdom. Constructive criticism is a good thing. Once again, thanks for reading, and have a great day :thanks:
 
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