2-3 Hours of direct sun, enough to grow Catts?

[Tim C.]

I'm thinking of installing a small shelving area to give my Catts summers outside. The only area I have available is a 5' long strip of fence that gets 2-3 hours of direct sun from 11am on, and very filtered sun afterwards. By very filtered, I mean that the sun is coming through two rows of trees before it hits my back yard. The filtered sun should be enough to grow Phals, but I don't know if the whole shebang is enough for Catts.

Any input would be greatly appreciated.

-Tim C.