green zebra tomatoes

[Pompeylottie]

despite good intentions,my tomatoes are growing jungle style and the label fairy has visited again this year and removed all my carefully written labels on cut up margerine tubs.
So I have grown green zebra tomatoes together with other sorts including Tigerella. How will I tell if its a ripe zebra or or non-ripe Tigerella? apart from the obvious tasting it.

Are anyone else's tomatoes being very slow to ripen? I have only picked a few so far.

[poly]

Green Zebra ripens from green with green stripes to green with yellow stripes. Tigerella ripens to red with yellow stripes. In general, green when ripe tomatoes have more of a subtle ripening colour change than most other coloured tomatoes, taking on a slightly yellow hint over the green. Giving a gentle squeeze is a good way to tell if you have any doubts.

Pic of a ripe Green Zebra

[Pompeylottie]

thats very helpful, thanks. I just hope they ripen soon, before blight strikes.