A greenhouse full of plants, vegetables and flowers provides plenty of places to hide a house key. Bury a key in a flowerpot full of soil or stick it in the bottom of a container of shovels, spades and other tools. The multitude of hiding places makes it difficult for anyone not in the know to track down the key, providing a higher degree of security. To keep things extra safe, lock the greenhouse with a combination padlock, so the key will be hidden behind a secured door.
Key rocks are nothing new, but improved models provide an extra degree of security when hiding a house key. The RocLok is a handmade, faux-rock with a compartment for keys protected by a combination lock on its underside. Cheaper key rocks do not have this security feature, meaning the key is accessible to one anyone who stumbles upon the rock. Weather-resistant, RocLok come in a variety of styles and looks to match the rocks and stones in your region.
House keys can be hidden in plain sight with the use of everyday items altered to conceal keys from view. The thermometer key hider from the Home Security Superstore resembles a typical plastic weather thermometer, but opens to reveal a compartment large enough for two keys. The same company also makes a key concealer that resembles a sprinkler head. Simply open the device, place a key inside and push it into the ground where it looks like a regular garden sprinkler.
One place the craftiest thief will never find a hidden house key is inside the home of a trusted neighbor. Though devices to hide keys might be clever and tough to spot, you still run the risk of a robber or other undesirable person stumbling upon your secret. To play it safe, ask a neighbor to keep a copy of your house key stored in their home so that if the original is lost, a replacement is just next door.