Dwarf Gold Mop Cypress

[Nefertiti]

I have 3 Dwarf Gold Mop Cypress bushes in pots for 3 years and now the middle one doesn't look too good. I noticed that it's the only one that has a load of crabgrass and weeds in it. Could this be causing the problem? I will remove them as soon as I can get some time now that the weather is getting warmer. Will fertilizing it help revive it or is it lost? Attached is

 

[cpp gardener]

All is not lost! Try using a liquid fert to revive it faster. You could also add some fresh soil on the bottom and sides.

 

[Nefertiti]

Would it be better if I removed it carefully and put in all brand new soil?

 

[Nefertiti]

Would it be better if I removed it carefully and put in all brand new soil?

 

[cpp gardener]

I prefer to leave roots alone, but Bonsai enthusiasts like to trim and thin them and add all new soil.

 

[Meadowlark]

Three years in the same pot? I definitely would check it to see if it is root bound. If it is, the others will also soon show signs of demise.