growing succulents, specific the less common ones(not the ornamentals you see in peoples front yard like aeonium, pig ears cotyledon, jade plant,,,etc), not brought from stores. like lithops, or similar species, or some unusual echeveria, without killing it. also orchids. there doesnt seem to be much in orchid variety as most wild species are likely hard to grow in horticulture, or impossible(due to thier emphermeral nature, and rarity, specific habits, they are all mycoheterotrophic to various degree, fully MF is not likely to be seen in the near future of ending in someones garden.) ive seen people in my neighborhood did try to grow it outside, but they stopped because either neglected or it become too much maintenance/hard to grow them, mostly due to neglect.