Before we leap into the fray with gusto and abandon, if you are new to this series, you can quickly catch up with the rest of us by perusing and pondering our earlier columns (see Part 1, Part 2, Part ...

LAST week, our plants learned to tell us they are thirsty. Now we are going to expand their repertoire. Spider plants are happiest at between 20 and 30°C. That range suits me too, so it may seem that ...