Take the poor thing outside and give it some sunlight, ASAP. Give it as much sun as you can. The reason there are only leaves on the tips of stems is that the plant is reaching out for light. Once you see new growth coming on, hopefully on the leggy bare bits, you can give it a haircut all over. Rosemary is very forgiving when it comes to pruning, but I think you need to be very careful with a sick plant.

I have a lot of Prostrate Rosemary all over my gardens. They do get bare in the middle and all green on the ends when they are older. WHen you say yours is larger I'm not sure what that means. You could try just taking off 1/3 of the growth and see if you'll get new growth back along the stems. In my experience, Rosemary gets "old" after only a couple of years. When planted in the ground: As the limbs grow longer they lay on the ground, put out roots and make new plants; the center can get pretty ugly. I cut away the newer plants and hack-out the older middle. I don't know how you handle this when it's in a pot.... perhaps Bonsai it.

Thanks Westelle -- You have described my rosemary exactly. It's a couple of years old and I don't really think it's intended to be in a pot. I'll nurse it through the rest if this winter and then will plant it outside to see if it can put out some branches that will root on their own. I'll keep my fingers crossed about them surviving outside next winter although I won't count on it since I am in CT... Guess I should look into another type of rosemary to grow in a pot. Thanks for letting me know it's not something I am doing wrong, but is really a characteristic of the plant itself.

All Rosemary's will want to be big plants. You could keep one small IF you want to learn how to do Bonsai. Rosemary lends itself quite nicely to this art form.

Also, you could always pot-up a baby for the next year from the existing original.

Isn't there a difference between 'creeping' & 'prostrate' rosemary? I had thought the creeping sent down roots along the creeping shoots but that the prostrate would spread along the ground but only had the main stem root. I bought the prostrate varieties hoping it would spread & fall down over a low wall ... but not put down roots along the way!

And yes, I was told it was also called 'prostate' rosemary for it's medicinsl properties!