Is the whole area wheelchair accessible or just parts of the garden?

Mainly, yes.

Pretty much all is ADA. Even up to the tower is spiral walk. Of course in the glassed in building you won't be able to go into some heights but be able to get a good overview.

A great portion is ADA compliant

A good portion is accessible via ramps and concrete walkways, most of the greenhouses and the lake are not wheelchair friendly as well as the rose gardens but they are not in bloom currently

Most of the park is handicap accessible some of the indoor gardens where goes up and around the plants are not there are stairs and dirt tracks they're also walkways outside of the park that are also dirt the main areas and the children areas are all handicapped accessible

Ya some parts are ok. Not cement ,dirt. Just depends where you go.

Most of it is wheelchair accessible. The area around the lake is not because it's surroundings is made of dirt and something else, but it's not really safe for wheelchairs in my opinion. But almost everything else for the most part is safe.

Very wheelchair accessible except around the lake

I haven't seen the entire hardens but I dint recall anywhere it wasn't.

I think only most of it is wheelchair accessible

90 percent