This is very cool
Things I would want:
1. Appropriate growing zone (ideally USDA hardiness zone low and high limit for Americans; others for other countries)
2. Filter by produces food
3. Needs pollinating partner; if so, what's appropriate (eg if you're looking at a Bing cherry it should tell you required and to get a Stella Ann, a Van, or a Black Tartarian; if you're looking at a Bavay's Green Gage it should tell you not required, but providing will double yield, and to get an Italian Blue Plum.)
4. Producing time-of-year
5. Water requirements (people in Arizona shouldn't grow rice)
6. Importation issues (many of these will be unavailable to a Floridian or a Californian by mail)
7. Sunlight requirements
8. Indoor appropriate
9. Container size if any
10. Soil acidity requirements
11. Filter by live plant vs seed vs whatever
12. Planting time of year