If you know a keen gardener, why not get them to grow something useful. Send them a Beer Garden in a Matchbox, which contains enough hops seeds to get your own home-brew started. Whilst they're waiting for the bushes to grow, crack open a bottle of their favourite beer from the local off-licence (handy bottle opener keyring included in the matchbox), and tell them to  relax. The potting up won't be for another couple of weeks at least.