A garden in a dream typically reflects the parts of yourself you're deliberately tending -- habits, relationships, or projects you've invested care into and are watching take shape. An overgrown or neglected garden can point to areas of your life that need more attention, while one in full bloom often names growth you can already feel paying off.
If the ascendant sign is not from the same nature of the request or the requester, the invocation would be meaningless and; the requester bewares! - Picatrix (Andalusia, ~1000.AD)