From northern California:

All the books say celery is hard to grow. I thought I'd take a flyer.

Nine weeks ago I planted four small plants from the nursery and they appear
to be doing fine. They have been well watered and fed. Each plant has about
twenty stalks 12-15 inches high. The diameter of each stalk is quite small
and is not terribly tender.

Are things on track? What should I be doing?

Thanks