On 12/01/2011 08:03, Chris Hogg wrote:
On Tue, 11 Jan 2011 20:39:14 +0000, Adam

I always generously crock big clay pots with a layer of broken bits,
but never bother with plastic pots as they have multiple holes and
often a 'castellated' base.

If there is a problem with plastic pots, it's that they are vey light
and a tall plant blows over too easily. A few crocks help add weight.

Recently I've tried "blocking" all the drainage holes with thin slices
of Oasis (sometimes adding crocks above simply to add weight). The
reason for doing this is to dissuade ants from entering the pots and
forming nests, and eventually removing much of the soil. As I grow many
plants in very sandy soil, this is a serious problem. So far it looks
successful, but I'd be interested to see the results if anyone else
wanted to try it. By the way, it doesn't seem to affect drainage as
water simply runs through the Oasis.

--

Jeff