Talking with the kids the other day we got onto the subject of immigrants and their positive effects. I found a perfect analogy in the garden:
We have a blackberry 'bramble' that leans into our garden through the ivy and over the wall from a neighbouring garden. We did not plant the thing, we did not invite it in but we have come to welcome its presence. Each year we enjoy blackberry and apple pies, blackberry jam (2 1/2 Lbs this year and counting) and blackberry ice cream. It costs us nothing but adds to our lives. all we have to do is keep the ivy at bay and ensure it has room to thrive.
It got me thinking about the other plants in the garden... Yes. A lot of them immigrants and some of them sneaking in via the digestive tracts of birds (tunnels of sorts) visiting from elsewhere, appearing to shit on us from a great height yet bringing forth bounty.