Perhaps you went on holiday and asked a friend or neighbour to look after your plants and pets while you were away. It's kind of them to step in and house-sit for you, and we know you'd return the favour if asked. Show your appreciation with the gift of a carefully-chosen houseplant.
If they've spent time tending to your indoor plants, it's poetic to show your thanks by giving them a plant of their own. Give them their own version of their favourite plant in your collection, a pretty flowering plant for their garden, or a propagated baby plant that they can look after themselves.
Then they’re bound to be willing to look after your house next year as well.