Going on holiday means that you will not be able to water your plants. This might not be an issue for plants in borders but can prove a real problem for plants in containers.
Tray, Plastic Bag, Watering Can, Spade
Stand large pots in watertight bin liners and water them well.
Tie the bag loosely to reduce evaporation.
Plunge pots in the borders. This allows plants to draw up water from the surrounding soil as well as keeping the roots shaded and cool.
Place houseplants in a shallow tray with a small amount of water in the base. Grouping plants together traps hudmidity underneath the leaves reducing water stress.
Growing a Lily in a Container