I'm having an issue with brandywine otv and paul robesons. they looked great for a long time, and now all of the new growth at the top comes in all twisted/curled.

i'm using an earthbox, so the water levels are supposed to self-regulate, and i don't see any purpling of the leaves. the lower half of one of the plants looks totally healthy; on the other, the leaves are curling just a little bit.

any help would be much appreciated!

brandywine otv up close

http://farm6.static.flickr.com/5026/5673037885_f532708e5e_b.jpg

paul robeson on left, brandywine otv on right

http://farm6.static.flickr.com/5187/5673605858_42bd486420_b.jpg

top of paul robeson

http://farm6.static.flickr.com/5264/5673605520_5b740282cb_b.jpg

paul robeson in foreground

http://farm6.static.flickr.com/5306/5673036491_fd50c195e7_b.jpg

thank you :)