HI,
You have a great start to your grow EVZ... They're some very healthy looking babies but you may want to re think your soil mix. The problem in using the osmocote soil with marijuana is........ say you use a vegetative formula in your potting mix. It releases its food, and your plant is doing well. When it's time to switch to flowering nutes what do you do? You can't get the Osmacote out- it's mixed into the soil. I would stay away from any time released fertilizers. You really have no control of the release times or the dosing amounts. If you haven't got any of the MJ preferred nutrients available, you should find a good organic fertilizer from your local garden center or home improvement store. If you can find Alaskan Fish fertilizer, when used as directed, you will get good results, without burning your plants. They have a grow and flower version, and its organic. Otherwise, ebay has Fox Farms, which is a top choice for MJ.
I'd suggest transplanting them into some soil without time released ferts. How long have they been in those pots? If you recently tranplanted them you might be able to take a small amount of soil around the root ball if the roots are not too developed in those pots. A high quality organic soil like Foxfarm Ocean Forest can be used right out of the bag with little or no nute feedings to get great results. I've used 1/4 to 1/3 strength nutes with FFOF and had extremely dank results and I know some growers who use FFOF without any added nutes and they have some very dank and tasty bud but a little less yield than when they do use some light nutes to give the plants a gentle nudge during flowering. Or a great alternative is FFOF mixed 50/50 or 2:1 with Foxfarm Light Warrior medium and some added chunky perlite makes a less 'hot' soil mix that will accept slightly more agressive nute feedings.
But... there are lots of high quality soils that cost less. I've heard pretty good things about Miracle Gro Organic soil and that mix or any organic soil would be a much better choice than the slow release fert soil you are growing in now. The only time released ferts that marijuana loves IME is organic nute amendments that are added to a high quality organic soil mix. Organic additives like bloom bat guano, rock phosphates, bone meal and blood meal make mj happy, happy, happy... A rich organic soil provides all the plants need for nutrition and if you choose to supplement their feeding from a bottle it should be an organic nute and used at 1/4 to 1/3 strength to avoid overfertilization.
If you use your osmocote soil through flowering they will more than likely have too much N late into flower and may not finish ripening properly. Also... if you feed them any nutes from a bottle in this mix I wouldn't go past 1/4 strength and they probably don't need any nutes while in veg unless they show signs of a deficiency...
Happy Growing!
