Goji berry leaf discolouration

hi,

I purchased a goji berry plant last year and, after thinking it had died over the cold winter, it has come back great guns. It was in the green house all winter and up until a few weeks ago when i decided it was out growing the green house, so I moved it outside. After a week away i came back to find the leaves had all gone a dark colour at their tips and veins. Any one know what the problem might be? its in a pot, i feed tomato fertilizer and chicken pellets every now and then (when I remember). My girlfriend who was looking after it while i was away tells me she kept it well watered all week???

Thanks

 

Can't help in any way, but my mum and dads has done exactly the same, also well looked after, seems ok tho.

 

Cheers mate,

Good to know I'm not the only one. After my return and plenty of water and some tomato feed the darker colour seems to be reducing in area??