We use the product from AEA – accelerate, I think? We found it to be really effective at shortening internode spacing on tomatoes.

Does anyone know how products like this are made? I’m keen to make our own. Is it a calphos powder mixed with an acid and then a chelator?

Speaking of chelators – can anyone point towards some resources that explain chelators in depth? I’d like to know how to determine the necessary quantity when formulating a spray/drench, and how to evaluate different chelators.