The Miracle Gro ferts will work perfectly well. Horticulturists have determined that virtually ALL plants require and take up nutrients in a 3:1:2 ratio regardless of their current life cycle (seedlings, mature plants, flowering or fruiting all absorb and consume at that same ratio) and both the MG products offer nutes in exactly that ratio. So NOT just for flower production but for overall heathy plant growth. The last product has only N so not a complete fertilizer and not at all ideal.

btw, containerized plants do require repotting periodically and depending on the soil media you are using, that may be as often a every year or as long as every 3 years. Larger plants in larger containers can be pushed out to as much as 5 years in some cases but not hostas. I repot mine every other year.

i would be more concerned about the media wearing out.. causing water issues ... than i would be about fert ....

the media is the most important thing in the pot.. its a water management system ... and when it wears out.. or gets too filled with roots ... you lose proper watering ...

so get some good media... up pot ... every few years ...

as to fert .. how do you apply it?? .. i would use any such at half strength ... and maybe water with such.. once a month .. stopping in sept in my ground freeze MI .. i want the plants slowing down for winter.. not all juiced up ...

also note.. they start growing roots to store energy to come up next spring .. in late summer .. so that is a great time to re pot .. so they can settle down and start storing energy ... i would not fert after repotting ...

youre in a higher zone.. so figure out the timing for your area ... babka hopefully will chime in on that ...

and heck.. if you are going to go thru all that.. why not just plant them.. lol ...

you arent a farmer here.. fert should not be all that mysterious ... go easy ... just keep in mind.. they are plants ... throw them on the driveway hosta .. they are not foo foo plants that need anything much special ...

they are hosta.. not children ... they dont need to be coddled ...

and if they are too big to repot.. divide them.. throw the bigger chunk in the ground.. or on the driveway ... and then just pot that nice smaller piece you want to play with ...

ken

ps: do you know what a good media is?? ... brand name.. etc ...

I usually just mix up fertilizer in my trusty watering can. Then pour on at soil level.

The potting soil I’m using is this,