Yellow/Brown/Spotted/Crispy Lower Leaves

growing with dry amendments can be tricky. You need to have a good microbe life in the soil as they are whats feeding the plants, they break down the whole structured products you put in their like bone/bloodmeals and manures then the plant can take them up. I would expect the over feeding to also be affecting the upper leaves as well where the plant is using it the most vs lower. I have had issues like this in the past and found out it was in relation to the PH of my water and how much I was giving it. I now PH my water to 6.5-6.8 and aerate it before giving to the plants. I would follow the guides on the products for top dressing and mix into the top 1" of the pot. You should be addingg in more soil if there is good root development on the top layer. Then you won't be disturbing the root base to much. I also like to mix it in with a handful of compost or worm castings. As for a calmg product, most dry amendments have plenty of Calcium but sometimes lack in Magnesium, can easily supplement this with some epsom salts or magnesium sulphate. Magnesium Citrate is also an option but way more expensive and almost always combined with binders or other things that are not needed. I use epsom salts with Gaia Green products and they are lacking in MG. they also take sometime to break down in the soil as well. so if you noticed the yellowing and treated it today. its going to take 3-7 days before you notice an improvement. Your NPK of 3-9-4 is good. If you have anything to boot up the K or the last digest "4" I would try and use it. It's not 100% necessary if you don't have it but in the future you will notice the plants like a bit more potassium. Seaweed extracts tend to be aorund .1-0-10 so they are good options. Best Of Luck!