So I bought a bag of miracle gro seed starter mix. It’s just peat moss, so I thought. I germinated 2 seed, paper towel method. when they sprouted a tap root, I put them into solo cups with a 50/50 mix of perlite and seed starter mix. Both of the seeds made it to the top of the soil then stopped before the husks came off. And they just stayed there. So, being the curious person that I am, I gently pulled the seedlings out of the medium. They came right up. No resistance at all! When I looked at the tap roots, the ends were curled up and did not look happy. Now I was really curious, so I looked at the bag of starter peat moss, and low and behold, the stuff is enriched with miracle gro food. So this just leads me to believe that the SEED starter "mix" is too hot for the seedlings. WTF. has anyone else had any experience with this stuff? I have 2 more seeds germinating now and they will be going into a 50/50 coco/perlite mix this time. I already have 2 in there that just started veg. About 3 weeks old and started the training on them last night. These two were started in used/depleted soil, basically inert soil. so there was no way they were going to burn. Now they are in miracle gro cactus, palm, citrus mix at about 70/30 soil/perlite and happy as heck! The food that is in this mix isnt the "feeds for 6 months" stuff. Just enriched with the nutients outa the bag. And the ratio is 0.6-0.2-0.4 so half of that is 0.3-0.1-0.2 which is found to be the optimum ratio for cannabis (3-1-2 or so I have read)
so far under 4 x 32.5w cfl 2700k 2600lm each and 1 x 23w (I think) 5000k just for spectrum diversity and 20/4 light schedule. I have 4 more 32.5w bulbs for flower.
The biggest problem with the standard Miracle-Gro nutrient formula is that it’s one formula for the entirety of the plant’s life cycle. Even if the standard Miracle-Gro plant food is decent for the first stage of your plant’s growth, it won’t be good for the budding/flowering phase. The ratio of nutrients your plants need changes drastically between seedling and full flower. Marijuana grows best with a nutrient system that accommodates their changing nutrient needs.
Many of us have grown up seeing Miracle-Gro being used in our homes, so we know that it works for ‘regular houseplants’. Cannabis is just a tough weed, so Miracle-Gro should be great for it, right?
Avoid Miracle-Gro Soil for Growing Weed!
Important: Do not use “Miracle Gro” soil or any soil that has “extended release” nutrients. These types of soil will continue to release nitrogen to your plant roots for up to 6 months. This can burn your cannabis plants in the flowering/budding stage and reduce your overall yields.
What’s worse than the standard Miracle-Gro nutrients is the original Miracle-Gro soil. Standard Miracle-Gro soil has “time-released” nutrients which contain high levels of nitrogen. While this formula will work okay in the cannabis vegetative stage (the first stage of life), the nutrients will continue to be slowly released throughout the plant’s life including during the cannabis flowering stage, which is not good.
Help where do I start!
I think the problem is that potting mix is generally meant for grown plants in pots, not seedlings. As plants in pots have less soil to gain nutrients from, a lot of brands infuse it with things like fertilizer and water-retaining ingredients. It’s also more dense in texture to pack more into a small space (ie, a pot), which can make it difficult for little seedlings to poke through. So it may not be the brand that’s the problem, but the fact that you’re using potting soil.
Another variable could be temperature. Are you sure the temperature was the same this year as last?
Has anyone else found this?
First time gardener seeks advice about soil
I don’t know what is put into miracle grow potting mix, but maybe it inhibits germination.
Potting mix just isn’t designed for optimal seed growing, so it isn’t surprising you had limited success with it. Any brand would have the same problems. Seed mixes are usually formulated to be low in nutrients, fine textured and quick draining. Potting mixes are heavier and contain more fertiliser.