Thanks gardengal:) I don't worry watering them and fertilizing them I'm worried because the plataginea that I devide last year didn't get bigger in new spot but some are double thier size in a little bit different spot.

Maples have surface roots so it's difficult to grow anything under them. I don't plant under mine and now the roots have grown 30+ feet out from the trunk and I am having difficulty in that bed. People that I know use both pots and spin out bags. The bags are turned inside out to prevent the maple roots from growing into the pots of hostas inside the bags. Of course digging under a maple can be challenging. The top of the bag is usually kept above the soil to prevent the maple roots from climbing into the bag. There are online sources for the bags used in nurseries to keep tree roots inside the bags and also for inexpensive pots to put into the bags.

Thanks miles 10612 :) that is I worried about the 3 hostas just plant last year and it's already root bound hard to scratch the soil that's the reason I wanna put them in the pot and put the pot over the same spot. I don't think I can dig those maple root to put spin out bag. I don't know if it's too late this season to repot them if they can survive next spring if I put them in a pot :/

Enjoy them where they are. When they seem to dwindle, THEN you can decide what to do. Some hostas are much more vigorous growers than others, so keep records to see who is increasing eyes, or looking bigger and stronger each year. Your one slower Plantaginea may have had fewer roots than the others, or slightly less crown material. They all look happy now, especially for this late in August. Good job!

-Babka

Thanks Babka :) I took the picture.of 3 hostas last week of June or 1 St week of July I believe but the row of plantaginea (2nd pic.) are from yesterday :) and this is today pic. few mins.ago didn't change much even in August i do really like the color combination of this 3 can't wait to see them bigger specially the great expectation

You need the Root Assassin shovel, it cuts through lots of tough roots. I bought one last year and it's been extremely helpful for me. It's available online. The large teeth are exactly what you need when you plant with maple roots!

Having grown hostas under large maples for years I can tell you it's a constant struggle. The more you water and fertilize the hostas the more roots you'll get from the maple and it is far more tenacious than you are. Solomon's seals and Japanese maples and a few other things can compete but otherwise I just started removing my hostas. One giant maple that. Had to have removed had dozens of hostas growing under it and the next year the hostas had grown before leaps and bounds after years of struggle. I won't make that mistake ever again. Beautiful garden by the way.

I've got 6 hostas under a maple for 15 years.....no problems....leave them alone for awhile and see.