|And old homestead foundation.|
|A Sugar Maple growing through the wheel of an old manure spreader. It has been there for a while.|
Other places have other "signature plants." Large parts of Texas, for instance, are marked by heirloom rose bushes that are growing on their own roots. Not only can these species last a long time but they resprout after being bulldozed.
Now suppose you wanted to bury some valuables. You don't know who is going to move into the house so you don't want to hide it in the house. Furthermore, there is always the risk the house will burn down or be bulldozed.
So where do you hide the valuables?
Burying the valuables under the lilacs or daffodils ensures that the owner of the treasure can locate them fifty years later.
Suppose an item were to become contraband...much like when Roosevelt made it illegal to physically own gold. Further, suppose the people given the task is as smart as you are and knows to search beneath the lilacs and daffodils. What then?
A couple of alternatives spring to mind. One is to plant LOTS of daffodils and lilacs and to have a single grouping of white specimens. It is virtually impossible to guess the flower color when they are not in bloom.
Another alternative is to "salt" the ground with decoys. Nothing triggers inductive metal detectors better than iron. Burying handfuls of 16d, galvanized decking nails (3.5" long) in strategic places is guaranteed to having the boys whipping out their shovels. Another decoy is to cut 3/4" foam into strips that are 1-1/2" wide by 5" long. Ultrasound back-scatter search techniques should trigger and get the boys excited.
These decoys are similar to the technique of "hiding" a house key where you know an intruder will find it. The intruder will use up valuable time, perhaps even breaking off the key in the lock as they try to make the WRONG key work.