2nd grow: Full Throttle! (Organic Slow Release)

Add some mycorrhyzzal that will help your roots extract all those micro nutrients. Yeah you can spice up your soil i would go lighter then heavy once its in its in. You can only add you cannot subtract. Good luck

normaly when feeding dry amendments you work them into the topsoil and water in. You do this once every 3-4 weeks before it starts to show signs of needed feed as it takes a bit of time to break down. If you roots are dense as the surface level you might need to add a bit more medium into the pot. Its also why its not wise to fill the pots up 100% on transplant so you have some room to top dress. Try to avoid damaging the surface feeder roots. You can also make a tea out of some amendments. but it likely to stink and indoors not ideal. Their are also options out there for liquid fertz that are like dry amendments in the sense they come from whole source things like fish and such. Some of them stink, some do not. I use one that does not. Fish Hydrolysate = little to no smell Fish Emulsion = very stinky Also this is the offical how to use it guide from GH https://shop.greenhousefeeding.com/us/how-to-use-it.html

If you dont have a ph problem. There are a few organic ways to add micronutrients to your cannabis plants. One way is to use compost teas. Compost teas are made by steeping compost in water for a period of time. This creates a nutrient-rich solution that can be applied to your plants. Another way to add micronutrients is to use seaweed meal. Seaweed meal is a dried and ground form of seaweed that is high in micronutrients. It can be applied to your plants as a foliar spray or mixed into the soil. Finally, you can also use rock dust. Rock dust is a finely ground form of rock that is high in minerals and micronutrients. It can be mixed into the soil or applied as a foliar spray. When choosing a rock dust product, be sure to choose one that is specifically designed for plants. Root death is also a very common reason for lighter new growth It's tough to get rid of completely, but we can try to slow it down. First, you'll want to repot your plant with fresh soil. Make sure the new pot has good drainage. Then, you can add some hydrogen peroxide to the water when you do water your plant – just a capful per gallon should do the trick. Also remember to let that soil dry out a bit between waterings. To figure out how long to wait, check the top inch or two of soil – it should be dry to the touch before you water again.