Hey all. I have a handful of seeds starting in solo cups. All but 1 of 8 sprouted and are growing. My question is how long do I keep them in the grow-box under 6500k CFL? Sprout to 2” tall? When to start fertilizer? What is next to identify the seedlings are ready to go to 3 gallon cloth home?
You’re plants appear to be stretching, that’s usually from not enough light intensity. You could probably lower your light some for now. Then just bury the stems a little when you transplant. You should also place your clear cups into colored cups to keep too much light from hitting your root zone.
I usually wait until the plant is about as big around as the container it’s in to transplant. But a little sooner or later isn’t a big deal. Nutrient timing will depend on what you’re using for growing media. An inert media will need nutrients as soon as cots start to yellow. A well amended soil can feed for quite some time, some even the full length of grow.
Thanks for the reply. Yeah they are stretching for sure. I use 6500k CFL @ 100w about 6-8 inches above the plants in a grow box. I spray them down at night then take the cover off for the day. The bud is from white widow autoflower probably a couple more weeks. image|375x500