Assuming you are using RO water:
When watering seedlings, should I add the Cal\Mag at 200ppm for the first few weeks then start it up with A&B around the third week? What about Superthrive?
When flushing at harvest, I will likely do a 7 day flush but am confused as straight RO water making the medium unusable for future grows. What do you leave in your final flush water for the last few days? Do you have a nice clean white ash with no crackling?
I see many of you state multiple times that you use various micro nutrients throughout the grow. What micro nutes do you use? How much and at what times?
Thanks for the help!
You are right to think that "seedlings" shouldnt need hardly any nutrients, if any at all... But I do recommend using a light dose just to assure your coco's microbes and buffers are kept nice and happy and also so that the nutrients are there when the plant does need them. Be careful about which products you use and cut the dose down by like 70-90%
There are a few products I would recommend for watering/feeding seedlings:
Cal/Mag is something you want to use since you are using RO Water but for seedling I think a lower dose (like 80-150 PPM's) should be enough for the seedling stage... Next I would suggest a
Seaweed/Kelp product... Other additives to consider are Humic Acids, Fulvic Acids, Sugars, Silica, L-Amino Acids, Vitamin B1, and Inoculants are all ok to use on seedlings at low doses. Superthrive is okay, but it is best used once at plantings/transplants at a few drops per gallon... Thats the only time I would use it and they say not to use it on flowering plants, and that it may have ill effects on your microbes as well.
You can keep a little cal/mag, sugars, and humic acids in your final flush solution... just try to keep your PPM's above 100 and below 300 or so and you wont have any problems.
Ive used several micro additives but most come with high N levels so you have to keep that in mind or try to find one low in N if you can... whatever micro supplement you use, keep the dose at 1/2 or 1/4 strength and make sure that you aren't doubling up on any dangerous micros when you add it to your base nutes.
-You can get a good portion (but not all) of the Micro's you want from the Canna A/B base nutes and the 200+ PPM's of Cal/Mag Plus supplemented.
Peace players
