I grow Parcel. It is a leafy substitute that tastes exactly like celery without those mushy chunks. It is extremely easy to the point where it could get invasive. It's also long lived - my original plant is 5 years old and still going strong. It also doesn't need all the water normal celery does.

We've tried growing celery in the past, and wouldn't bother again, but this year we're going to try growing celeriac instead. I've heard it's supposed to be much easier.

I have never grown celery, I think if I was going to I would go for the trench type, I think the stuff grown by commercial growers must be the self blanching type, but it always looks almost as green as grass to me, instead of a nice off white colour.
Celery is good if you're trying to lose a bit of weight, as you use more calories eating it than it contains, Derek.

Nice one derek my wife is on a diet and also Its good diabetes which I have.I was favouring the trench type for similar reasons.

Not grown would suggest celeric easier