fatsia problem

I potted a fatsia japonica some 5 years ago and it flourished with deep olive coloured leaves up until a year and a half ago.
Although I feed it well it has new growth but all the leaves become a sickly yellow and quickly turn black.
Any help will be grateful.

 

Although you may feed it well 5 yrs in a pot is a long time, assuming its the same pot.

Fatsias are hungry plants and grow much better planted in the ground.

 

I've had Fatsia in a pot for many years , and ocasionally every couple of years I would cut right back some branches to rejuvenate , I kept mine in a shady spot and recently I took out a couple of sad looking branches and stuffed in a pot and they are very happily growing.
Perhaps there is a pest problem for the sticky leaves.

 

My Fatsia is starting to lose condition. This autumn it's getting planted out in the garden where it can really spread it's wings

It'll leave a gap on the patio, but I have decided to replace it with an angelica in a pot. Ideal I think - biennial and it can grow as big as it wants in a pot for a couple of years.