Quincunx

In Gilbert White’s garden (see Reviews), some information was hidden in boxes, which was fun  

SO

Lift the Lid!

Do you have any quincunxes in your garden? October is the time for re/planting spring bulbs - how about a tulip quincunx?

And now for a riddle - completely unrelated to quincunxes

Image by Unsplash

What plural becomes a singular when you add an ‘s’?

Answer next month!