I live in zone 7A so the only thing I grow that lasts longer than say 3-4 months are my Blueberries.
I refresh that box with a new fert. strip of Hollytone in April every year. It does not need dolomite since it is an acid loving plant. They have been in that box about 4 years and are doing great !
Slightly off topic.......
I have about 18 blueberry plants, all in 2 1/2 gallon pots temporarily. In the EB, do you leave them out all winter? What steps do you take to 'winterize' them? I'm not sure what to do them, especially for winter. Maybe group them all under a dark tarp secured to the ground?
I can't afford EBs for them...
When my plants outgrow their pots, I'm considering hiring someone with a backhoe to cut a 2 ft trench along my 100 ft sand/rock driveway. If I save all the mix I discard when refreshing my boxes, that would work well with the sand that would be excavated. I have 1 year in the pots to decide what to do, assuming they survive winter.
We're in the same zone... am I overreacting?