How to Grow Celery from the Store Cut off all stalks and place heart in water with good sunlight. Change water every few days. Watch new leaves grow! Transfer to soil when 2 tall. Don't harvest until 8 tall.
Growing Celery from the stalk - important that this site tells you to put it in dirt after 3 days - and I have to say that would have been a good idea. Mine rotten from leaving it in the shallow dish of water too long :(