How long does it take to grow vegetables?
Is it a pretty instant thing, wot with 'er magic?
Well, lets make it fun-say you get 12 hours of 'crafting' time a day with 12 TU, 1 TU=Hour. Though your power is supernatural, so you could use it all up in one big shot, more or less instantly. That's more cinematic!
If you wanna mimic a boon or bane, it'll take 1 TU per power level. Averaged out for wild fruits I generate, so they will be sort of better-but with more random effects tacked on. So you pop out 4 Lampsur fruits a day, at 3 TU each one. Or maybe a big bush that gives 12xFruits that benefit you with regeneration I, 1 TU each. At some point you'll be able to do, for example, a food that gives invisibility when you get alteration level 6. You can grow two of those a day. If you really like crafting, I could maybe boost up your TU with later perk bonuses.
I'll also let you make a 'flowering' plant that replenishes itself-essentially, you spend the normal TU cost on one day, and on the next day it matures and produces the fruit you indicated, and pretty much continues to do so every day. On the downside of being immobile and vulnerable.
I'll have to adjust the durations of the effects based on whatever your imagination creates. And the terrain you grow things on may increase or decrease the TU cost, depending on the nutrition in the soil.
...
Sound cool? It should allow you to really spread your support powers around, as usually you only get as much as you can concentrate on, which is one ability at a time.
Also, I literally am just thinking it up as I write. :V