Welcome erica. Dreads like to start knotting on 5-6 inches of hair, but will sure separate into sections on hair shorter than that. There is a product you can take called Biotin, found in your local drug store or department store in the vitamin section. It promotes hair growth in about 3 months time to notice. Take 6000 mcg daily, if you can't find that strength, just add up the tablets to equal it. Costs less than 10 bucks.
Welcome hope your dreading journey goes well, and if you have any concerns or questions, feel free to ask.
Welcome to the community MJ and to the beginning of your wonderful journey. I see you use the baking soda wash, apple cider vinegar rinse, here are the proper ratios just to see if yours are correct: http://www.dreadlockssite.com/forum/topics/ratios-baking-soda-wash-apple-cider-vinegar-rinse-sea-salt-mix
You will go through many changes now, many of your T&R will loosen up and some will fall out, let them do their thing, don't retwist. Want to know what to expect now? Read this: http://www.dreadlockssite.com/forum/topics/just-starting-out-what-to-expect
If you have hard water, you may need to use either bottled water (I buy the water cooler jug size), or boil your water to use for the baking soda, as it does not mix properly in hard water. If you boil it, let it cool and pour out the water slowly leaving the mineral residue in the bottom of the pot. You don't need to do this fosr the ACV. Enjoy your journey to awesome dreads....peace