What can I do to stop my lavender plant's wilting?

Question

I got a freanch lavender plant at trader joe's just 3 days ago. When I bought it it was extremely healthy and no signs of wilting whatsoever. Within a couple of hours the plant was wilting. The soil was adequately moist as it was last wateres at the store, and I didn't water it because the research I had done about lavender says it prefers drier soil and shouldn't be watered too often. I just got it and don't want it to be a waste of money, what should I do?
Thanks

I replanted it into a bigger pot just yesterday because the plant was so big that it would easily tip over the other plastic pot. It was wilting before that though.
I have kept it inside sometimes since it was too windy outside that it would get knocked over.
(I live in Reno, NV if that helps)

Answer 1

The first thing to do is to make sure NO AIR is getting around the roots/air pockets providing of course you have just replanted it.
Open the link below

Pathogens
http://www.ces.ncsu.edu/fletcher/staff/jmdavis/lav.html
The most common disease.......................
.......problem with lavender ..................
..................is wilt........................
Vascular wilts are very destructive diseases with typical symptoms characterized by rapid wilting, browning, and dying of leaves and succulent shoots of plants followed by the death of the plant. English lavender varieties are more susceptible to vascular wilts than lavendin varieties. Dark-flowered cultivars are less resistant to disease than the pale-flowered varieties. Cultivars with gray foliage are quite susceptible to infection. Vascular wilts are most common in the month of August when temperatures reach 90° F and humidity reaches 90%. If damaged plants are present, remove and destroy any infected plant material and avoid replanting with susceptible varieties. Dr. A. O. Tucker advises using one to two inches of white sand as a mulch around plants to reduce fungal pathogen infection. In addition, he found that the sand increased flower and oil production when compared to a control group of plants which were not mulched.
Good Luck!

Answer 2

It,s probably just readjusting to its new place/soil, give it some time, keep it in a sunny spot also, and do water some even tho lavender does better once established on the dryer side.