NOTICE: I will be updating this as I experiment/find stuff out.
If you throw a perfect fruit/veggie [or cheese/egg, not sure about steak], at the stage, there is a chance it will land in the performer's inventory.
Where am I going with this?
If you have a Sim in the household with the Perfect Garden wish, planting that perfect whatever DOES count to their Lifetime Wish. I managed to fulfill the LTW of one of my grandma Sims this way.
Edit: I forgot to add, so far as I know it doesn't work in the large venues, just the smaller ones like Performance Park.
As for the process: Put one sim who is a performer [Acrobat, Magician OR Singer doesn't matter which] one Gardener in the house. Both have to be under your control. Have the Performer work up the ladder a little bit [I always wait until level 3 or so], then go get a gig at one of the smaller venues. Have your Performer sim perform, and your gardener sim watch. While the Sim is performing, your Gardener sim will have the option of throwing items at the stage. Access this menu by right clicking on the stage while your Performer sim is doing their show. This includes stuff like roses, footballs, baseballs and food.
The food ranges in quality from Horrifying to Perfect.
The vegetables that you can throw are:
Lettuce
Onion
Garlic
Bellpepper
Potato
The fruits that you can throw are:
Apple
Grapes
Lime
Watermelon
Tomato
The other items you can throw that are plantable are:
Cheese
Steak [I need to double check this]
Egg
Burger [I need to double check this too]
Please note: There is a minor cost for throwing these items, ranging in 2-40 simoleons.
After the show, place the food items from your Sim's inventory on the ground of your lot. And have your Gardener sim plant them. Voila! A Perfect Garden in a fraction of the time!
Now as for the chances of your performing sim receiving the item, I would say 60/40. I don't know how to find out. I don't have World Adventures, and I did notice a number of plantable items that came from that expansion pack. If you have that expansion pack, use the method I described to find out if you can throw those other items at the stage, and please let me know. Also if you're interested with experimenting with Simport, let me know too. I need to find out if a plantable item thrown at the performer is taken home with them.
Edit: Apparently the plantable items do NOT go back home with you.