In general, you can prune up to one third of the height of most shrubs without damaging them. There are a few exceptions to this rule: Pine shrubs, for example, can’t be trimmed below the point of new growth without damaging them.

This depends on how many leaves there are. Mowing over dry and crisp leaves with a bagging attachment saves most homeowners a lot of time. If you have a smaller lawn and few leaves to mulch, you can put the leaves into a stand-alone mulcher resembling a wood chipper and collect the mulch from a hopper. This prevents having to do multiple passes with a mower.

The best way to clean artificial turf is to use a stiff-bristled broom or rake to loosen up any large debris once a week. The process will also redistribute the infill material that keeps your turf blades standing up straight and evenly. For artificial turf maintenance, do not vacuum your turf or apply cleaning solutions. If you need to rinse the blades, spritz them with a light hose. 

Generally, it is not necessary to remove old mulch before applying a new layer. As organic mulch breaks down, it enriches the soil with nutrients. However, you should remove the old layer if it shows signs of fungus or disease, which can be common in moist areas, or if the total depth is already too thick. Avoid letting the total mulch depth exceed 3 inches, as this can harm plant roots. If you do remove old, disease-free mulch, it can be added to a compost pile.