I'll make sure the next one gets plenty of water! I gave it a normal amount out of fear of drowning it, but I suppose it just needed more. Poor little guy, I dehydrated it!! What a dumb mistake. Oh well. Next time!!
Ah, are you sure you didn't over water it then?

I'm not really sure of how your soil is, I just know I can't seem to kill mine.
Here's some information I found on
this Rosemary Guide:
"Rosemary requires only sunlight, good drainage and ample air circulation. A sandy, well draining soil and 6 to 8 hours of full sunlight daily will have the plants off and running in no time.
There is little need to fertilize the plants. A basic 5-10-5 fertilizer applied in the spring and perhaps a foliar spray mid season will keep the plants healthy and happy.
Where winters are somewhat severe and sustained temperatures are well below 30 degrees F., rosemary plants will have to be brought indoors for the coldest months.
Grown in a sheltered area with a southern exposure, my plants have survived short periods of temperatures in the low teens.
If low temps persist, bring a few plants indoors. Put plants in terra-cotta pots and water only as needed to prevent drying out. Rosemary doesn’t need a lot of water whether indoors or out, but it does need to be put in front of a sunny south facing window. If this is not possible, use artificial light. Heat is not critical. A cool room will do fine. Move the plants back outdoors once the frost-free date has passed."