I am proposing an all glass sunroom on the south west of the house, open to the countryside, to provide solar gain. I would like some suggestions as to trees to shade it during the summer but premit maxmum sun rest of the year and still look good. Maximum planting distance available from house to west 70 feet, 20 feet to boundary on south. Thanks
Practically any deciduous tree will fit the bill. Birch are fast growing and have a light canopy and will fit into twenty feet, or six metres.
Where there is more room you could use bigger trees such as walnut, beech, ailanthus or Norway maple. These will provide shade but need more space.