New to attic growing....... input??

[faithlessxxx]

If your outside temps are great all year, do a polythylene greenhouse with tomatoes around the walls.

[faithlessxxx]

The Little Greenhouse - small pvc greenhouse kits

Only a little more than a couple of lights and no bills. Polythylene has excellent light transmission qualities, better than glass.

[bejay]

while an attic can be hard to control temp wise in your situation where it only gets to about 80 degrees would think its probably do able even without a/c, insulate your room well and dont skimp on your ventilation as you will need alot to keep the temp down

[4x5]

Use positive pressure, build a box for the plants (big box) seal it up, feed it air from the house below, make sure you have a 2:1 ratio of intake to exhaust, of course insulate it; all you need to worry about after that is radiant heat from the roof and siding.