Cut the celery stalks about 2 inches above the base
Place the celery base in a shallow bowl with a little water
Set the bowl in bright, indirect sunlight
Change the water every 1 to 2 days
Wait for new leaves and roots to appear from the center
Transfer the base to soil once roots are well formed
Keep the soil moist but not waterlogged
Harvest outer stalks as they grow
Leave the center intact so it can keep producing