How many pots to save??

DW is ready to transplant the Basil. We need more dirt.

And shading on the stevia doesn't seem to yield results yet. After growing for a bit, a shoot's leaves start to wilt. The stem is OK - just the leaves turn brown and die, lowest leaves first.

http://www.ehow.com/how_2081316_grow-stevia.html says to water just enough to keep plants from wilting... I'm watering more than that.

http://www.burpee.com/herbs/stevia/stevia-sweet-leaf-prod000486.html provides similar growing advice and calls for full sun (and a maturity time of 40 - 60 days.) I'll need to try keeping things dryer... After germination?? Burpee also suggests planting 1/4" deep rather than on the surface. This conflicts with the need for 'light' that others have indicated. (Sounds like I need to do some experiments!)