This week, Reeves shows that the common practice of putting rocks in the bottom of clay pots actually harms plants rather than promotes good drainage. A better idea, he says, is to support the pot on rocks placed in the saucer underneath.

Clogs, colors, logs

Reeves also explores clogged sprayers, hydrangea colors and falling trees on the June 22 show.

It's a simple matter, he says, to unclog your sprayer's nozzle. He shows how to put your sprayer back into working order.

Want pink hydrangeas? Or do you fancy blue instead? Reeves shows how to manipulate the soil pH to change the color of French hydrangeas. A low-pH soil yields blue flowers. A more alkaline soil turns them pink.

Finally, Reeves uses a fallen tree to refute the common myth that trees have long taproots. He also shows how "included bark" eventually caused the failure of a 100-year-old oak.