...Hi Trip'- :slaps:LOL! I know, sometimes you wonder what the heck happens between grows, or even the same one but have different plant to plant results! Each pot becomes it's own ecosystem of sorts, lots of complexity going on in there, so over time, things drift differently for better or worse,... Ah! you have done foliar, and that's the right dosage for that- 1tsp/gal...... Oh yes, you can add too much epsoms! it's a salt, and build-up will be an issue if used at that initial treatment rate of 1tsp/qtr (or liter, which is a bit bigger than a quart)...general maintenance dosage is 1tsp/gal,... Hmmm, I'm wondering about your soil pH now, given what you said,... Mg can be locked out under fairly acidic conditions,... (oh, minor correction-- Mg symptoms can reverse some, except for really damaged leaves).... also, how much and how long have you been treating with epsoms now? If you've been giving dose at the initial treatment levels discussed, you just might have salt build up in there,.. both of thses can be why there's poor response to treatment.... If it's a salt build up thing, flushing will be necessary... it's a bit stressful to do this, if the pot stays soaking wet for long, but that can be dealt with,.... so, can you get me a soil pH? And let me know about how much and how often you were using the epsoms, and we'll go from there... flushing will help in both cases! ....yeah, a dedicated Ca-Mg supplement is a generally better choice,... :smoke:
*( a good trick for pulling extra water out of the soil : get a stack of newspaper, about 1/4 high, and set a couple paper towels on top, then place the pot on the towels,.. capillary action will help pull water into the towels and then newspaper.... Oh wait, you have air pots, with a raised bottom... okay, try a fat wad of paper towels, or a regular towel, even,... point is to get direct contact with the bottom and soil, so the capillary action can start working...)