Q.Tree Lavender, about 12” high. How to care for? Inside or outside? Sun or shade?
It is now outside having failed to thrive inside.

Lavender tree is just lavender that is shaped into a more upright form. Basic lavender care centers around using the correct potting mix, watering practices and growing conditions. Lavender does not like to be in wet soil. The roots will rot. Your container must have drainage holes. Between waterings, the top one inch of soil should dry out. To make sure soil by the roots doesn't hold on to too much water, add a handful of coarse sand, perlite or small pebbles to the mix. During the growing season, use fertilizer at half the recommended rate. Lavender comes from semi-desert regions; it likes hot, dry weather and lots of sunlight which is why it doesn't do well indoors. Read on: https://www.hgtv.com/outdoors/flowers-and-plants/herbs/lavender-trees