Not only is celery green like a turtle, it is very slow to grow from seed. it can take between 10 and 25 days to germinate and 100 and 120 days to mature. It needs to be started indoors about 3 to 4 months before the last frost. Since it takes so long and since I forgot to give it a head start, I decided to start the celery from scraps.
Next time you buy some organic celery, cut about 3 inches from the base and stick it in water. Remember you got to keep changing the water and give it light by the window or under a grow light. I am keeping my celery under the grow light next to the vegetable seeds and seedlings that I am giving a head start indoors. The above picture is what it looks like after 3 weeks. Once it starts growing in the middle, it is time to plant it in a pot to grow indoors until after the last frost – then you can plant it outside. If you can cover the plant to protect it from frost, you can plant it outside sooner.