Landscaping isn't just about producing an attractive design within your garden. You need to imagine what i may be like when it is mature in ten or 20 years time. You might also need to make sure that yuo account for future expansion of large trees.
Most parts of a garden will not change much, trees however, usually tend to step out of hand and grow huge. If you are not careful you might be confronted with the job of stump and tree removal which will be expensive.
What to be careful of:
Wall surfaces
If you place a potentially large tree close to a wall, the sapling may grow so large as to knock the wall over. If this should happen the stump and tree removal will be intricate to try and prevent further damage to the wall.
Pools
Placing a sapling near a pool is possibly very costly as the roots may grow into the foundation of the pool and cause splits and leakages.
Paving
Exactly the same can be said for paving. Tree roots have a tendency to cause the ground to shift under paving and make it lift. In both these cases the stump and tree removal will be less intricate as compared to a wall, but you will need to have the roots removed as well.
Utility lines
Be aware of what's above the trees and shrubs you plant. It is foolish to plant trees below power lines as they can grow so large as to foul the lines and even cause power interruptions.
Buildings
Having a large tree near a home or other buildings is possibly hazardous as braches or the tree itself may fall on your house or even cause foundation interruptions. Stump and tree removal close to a building is easily the most complex task of all and should only be undertaken by the professional. The potential risk of having aspects of the tree fall on the house is high and the damages will probably be costly.
Whilst landscaping is an excellent art it is a task of long term projection and engineering too. Be careful when you place your trees in order to avoid having to employ a person to perform a stump and tree removal at a later stage.