Shanker,
It means a lot when I get messages like this. There are so many people converting to top feed rockwool, and it's nice to know how it's going for them. You've asked some very great questions. Many of them are answered in my articles, but they are so good, I'm going to take the time to knock them out here anyway.
>>>Top Feed to waste in Rockwool.
You will only feed to waste during early veg. During late veg and flower, you will want to recirculate, or else you will waste too many nutrients.
>>>When watering seedlings in 1" rockwool starter cubes and also in their first nursery pot how much water do you see come out the bottom.
Great Q. You don't need to worry about this. You can literally pour a gallon thru the cube and you don't have to worry about it being too much water. The rockwool holds water and oxygen. When seeds are sprouting, I use a warm pad underneath to accelerate germination. The pad should be barely warm to the touch. The seedlings will grow faster if they are in a dome. But if you see a lot of water on the inside of the dome, it's TOO humid in there, and you could get stem rot (damping off) and the seedlings fall over and die. Take the dome off when you see the first two serrated leaves start. I use aquashield or some tea in pain water when I am watering seeds that are just sprouting.
In the dome
Plain water with a little tea or aquashield: (still in the dome)
Here I add a TINY bit of nutrients, maybe 100 ppm, and this is when I take the dome off.
>>>Approximately how long between watering at this stage?
I do once a day for sprouting seeds, until they are about 4" tall and then I do twice a day. Again, it's hard to water too much. Transplant up pot sizes conservatively.
You can see here I put the little block in a bigger pot (but not much bigger) with cubes around it. Here I take it to about 250-300ppm.
>>>Does the Heisenberg root tea replace your normal watering for that day? (Don't want him to end up overwatering his hypothetical, non existent seedlings).
Yes
>>>When the plants get a little larger. do we ad some heisenberg tea between the normal watering schedule? (Making sure not to apply nutrients within a few hrs of adding the tea) Whats your watering schedule when the plants are in their final pot?
For plants up to about 4" tall, you can irrigate once a day with ~300ppm+the ppm of your tap water. You can use the tea in replacement for the feeding for that day. As they get bigger, you can go two to four times a day. Add your tea an hour or so after you did your regular irrigation.
At this point you will want to go about twice a day.
Here are some pictures of a way to make an auto feeder with a timer and some drip line from the hardware store.
Hard to see in the picture but I made a little PVC manifold. YOu can also pick up a manifold at the hydro store for around $15.
>>>How late during flower do you apply the tea?
Almost all the way. It won't hurt to go all the way, but really isn't needed as much when you only have 2 weeks to go.
>>>What's your take on flushing throughout the grow? Havn't seen you mention it much. I saw on a greenhouse vid that they were flushing 3 times between weeks 2-6 and they let the plant dry out for a whole week after each flush. Reason I ask is because flushing that often would seem to leave very little time for nutrients and tea.
The vid you were watching was probably on dirt or coco. With cubes, you don't need to worry about any imbalances in the rockwool. Just irrigate for 15 minutes at a time, to ensure the PH and PPM inside your medium is the same as your reservoir water. DO NOT USE ANY FLUSHING AGENTS. There is no need to "FLUSH" throughout the grow when you're using top feel rockwool. Essentially you are flushing with res water every time you irrigate, so nothing "builds up" in the root zone.
>>>When, How often and What if anything do you foliar spray your plants with? (Not related to heisenberg tea sorry, but thinking on foliar spraying once a week or so with SM-90 since I can't find neem oil)
It's expensive, but I use Dutch master Liquid light and saturator at 30ml/liter each, to make up my foliar spray. It is the best and DOES make a difference. If you don't want to pay for that, use florablend at ~40ml/liter for a spray. If you don't have florablend, go get it, no mater what nutrients you are using. I use it at 4ml/gal from small plant, all the way thru flower.
GENERAL HYDROPONICS: Supplement Plants from Seedling to Harvest with FloraBlend®
>>>You mentioned that you use a recirc. Top feed system during flower. How do you know what nutrients to replace in your reservoir after its been through the plants? Do you just top it up to your target PPM? Wondering how much the PPM usually changes after the plants have drank some. Can you just run your pump less so you have less runoff and then can just waste it?
This is a great question, and I was just talking to another member about this yesterday. Don't run your pump less. Recirculate that water in flower, 15 minutes at a time, twice a day! For your reservoir, with recirculating top feed, a good rule of thumb, is to hold ONE WEEK's worth of nutrient solution. I'm sure you will find a good routine, but for example, if you have 4 plants using 25 gallons a week, then you would set your res at 25 gallons every time you mix up new solution. 3-4 days later, you will have ~12 gals left in the res, top it off back up to 25 with PLAIN water. Another 3-4 days later, when you are down to 12 again, throw away ~6 gallons of it, then mix up 20 gals of solution and start the process over again. Make sense? When your res is down to 12 gallons, check your PPM. If it is way too high, then you are mixing up your nutrients too high. Back off 100ppm or so.
Doing it this way will help prevent any nutrient deficiencies, or overages of any one component. IN that remaining water in the res, I promise you, something is lacking! It is temping to just keep topping up with water or nutrient solution, but if you don't do at least partial water changes, you will run into trouble, eventually.
>>>How far into flower do you continue to top and/or L.S.T?
Again, great Q. LST is a very broad term and is thrown around way to much by stoners everywhere. So I like to be specific with the training I do and avoid that term when possible. Most of my training is done during veg. Whether I use a trellis in flower or not, I don't use a trellis in veg. When I go to flower, I usually use a 4' x 4' trellis or screen (SCROG) and I push it down on top of the plant as far as a can (without breaking it) so the plant gets spread out. My goal is to fill the entire screen with bud. I try NOT to top when I go to flower. I top a lot during veg, but topping in flower can disturb auxins, and delay flowering slightly, by up to a week. However, if I have an unruly strain that stretches too fast, I'll top the tallest ones to slow them down, so I don't run out of height.
You really need to read this article:
How To: Bend and top your way to a 1 pound monster
>>>I know I saw this somewhere, but you apply the tea right from the seedling stage correct?
yes
>>>How large should a seedling be before it starts getting cal-mag, flora blend and aquasheild in its normal R.O water?
Above, where I mentioned 100ppm, you can start using it. What I do is mix up nutrients according to my recipe, as described here:
How to: Fast vegetative growth - Nutrient Recipe - Blogs - 420 Magazine ® then I take out a 1/2 pitcher of the solution, and then dilute it with RO water. Here is a time lapse picture of just 11 days growth:
>>>Sorry for all the questions and also if some may have been asked before. Been reading as much as I possibly can and needed to ask a couple of my own q's. Probably have too much info going through my head.
No problem. I've probably given you more than you asked for. It is a lot to take it. But don't get overwhelmed. Take one step at a time, and there's no reason you can't get the same results I do. Feel free to PM with specific questions. In my new article, I talk about seeds and seedlings a lot, you may find it useful:
Phenotype Hunting, Serious BubbleGum - Blogs - 420 Magazine ®