You would not use landscape in that way; the user asymptotically has explained why in an earlier answer.

What you could say, though is:

The landscaping at the school is beautiful.

NOAD explains it like this:

landscape (n.): all the visible features of an area of countryside or land, often considered in terms of their aesthetic appeal.
landscape (trans. v.): improve the aesthetic appearance of (a piece of land) by changing its contours, adding ornamental features, or planting trees and shrubs; [as n.] (landscaping)

So, if you want to point out that the landscapers have done a particularly good job of arranging the shrubs and caring for the flowers, then you could indeed say that the school has beautiful landscaping. (In fact, in that context, I believe landscaping is a better word than scenery.)

You would not use landscape in that way; the user asymptotically has explained why in an earlier answer.

What you could say, though is:

The landscaping at the school is beautiful.

NOAD explains it like this:

landscape (n.): all the visible features of an area of countryside or land, often considered in terms of their aesthetic appeal.
landscape (trans. v.): improve the aesthetic appearance of (a piece of land) by changing its contours, adding ornamental features, or planting trees and shrubs; [as n.] (landscaping)

So, if you want to point out that the landscapers have done a particularly good job of arranging the shrubs and caring for the flowers, then you could indeed say that the school has beautiful landscaping. (In fact, in that context, I believe landscaping is a better word than scenery.)