"David W.E. Roberts" wrote in message
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snip

Just about to pot up my lemon.

Ideally I would like it to grow in a patio tub, about 40cm diameter and 40cm
deep.

Is it O.K. to bang it directly into a large pot, or should I pot it on in
progressively larger pots?

ISTR that flowering plants do better if potted on only when pot bound.

However if the lemon was planted in a border then it would be in umpteen
squillion megalitres of soil (how big is the earth anyway?) and would grow
O.K.

Don't want to slow the growth by leaving it all lonely in a great big huge
pot :-)

TIA

Dave R