celery tall utah 52-70 improved seeds, 2000 heirloom seeds per packet, non gmo seeds, isla's garden seeds isla's garden seeds celery is a heavy feeder. it also requires lots of water. ... if celery does not get enough water, the stalks will be dry, and small. add plenty of compost and mulch around the plants to retain moisture. fertilize regularly. ...tie growing celery stalks together to keep them from sprawling.