I would like to know if there is any good web site that I can use to
narrow down selection of plants by various plant-characteristics.

I have a couple gardening books that have a list of plants described in
good details. But they are all sorted by their Latin names. I would
prefer that I can have an option to filter the list of plants and then
sort the list by various criteria from the most important to the least.

The kind of plant characteristics that I would like to be able to query
on a
- Annual, perennial, or biannual
- Zone requirement
- Sun requirement
- Water requirement
- Soil requirement
- Height and width
- Shape of the plant
- Flower color
- Blooming season
....etc

Any suggestion? Thanks.

Jay Chan