Make a list of what’s most crucial to care for. Account for your vegetable beds as well as your houseplants, and your lawn as well as your landscaping.
Most people really do not mind taking care of your garden, especially if you ply them with fresh vegetables or offer to return the favor if they have gardens of their own.
If you anticipate days of hot (or rainy) weather ahead, make sure you adjust your watering schedule appropriately.
Anticipate how much your plants will grow while you’re gone and set up stakes, trellises, or cages to support them.
Even if you’ve set up your entire garden to be watered automatically, you should still arrange for someone to stop by and harvest vegetables to keep your plants productive.