Algarve, Portimao,
Portugal 
Dianthus.
Bought a new plant this year and know nothing about them. Am dead heading, but will it live until next year to flower again or do I dig up? We do not suffer from frosts.
6 Jun, 2012
Answers
What variety of Dianthus? Most are perennial (though something like Sweet William or D. barbatus is biennial and will self seed easily) and enjoy a sunny, well drained position. I would imagine they would grow well in Portugal on a gritty soil. What you are doing sounds right to me, and your plant should survive winters if kept well tended.
6 Jun, 2012
I have several evergreen perennial dwarf dianthus that don't die back at all in winter
6 Jun, 2012
I have a large number of Dianthus of all kinds and none of them die back for Winter. In fact I cannot think off hand of any deciduous Dianthus.
Dead heading is a good idea as it does prolong the flowering season otherwise all they need is well drained soil and a bit of sun and away they go.
6 Jun, 2012
Your right Owdb. and Anchorman - must be losing the plot!
6 Jun, 2012
It comes to us all Moon grower!
:^)
6 Jun, 2012
You mean I have had ANOTHER senior moment - of flip - think I need a glass of wine... lol!
6 Jun, 2012
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It is a perennial so will die back totally in the autumn and then grow again next spring.
6 Jun, 2012