Re: heat zones, delphinium, etc.

HI Gale,
Sorry for the delay, I was away tramping.
Heat Zone 7 is a place where our delphs need special care to grow. 
They grow well for some folk, not at all for others. Plant them in 
the garden without shade, mulch and adequate water and you will 
never see them again. Plant them in mottled shade with good mulch 
and in an area that gets a breeze and for some folk they stay around 
for years. So yes, heat zone 7 is marginal, 8 is out of the question, 6 
and below - real easy.

Nashville - with great difficulty I would think

cheers

terry

On 13 Feb 2003 at 19:13, glink@att.net wrote:

> <<There are all sorts of other factors come into it like humidity, night 
> temps, local climate etc, but the heat zone map is definitely a useful 
> aid to us. I can see that Donna's ideas about accumulated heat day 
> requirements for plants would make the map very useful too.  - cheers
> Terry Dowdeswell
> Dowdeswell's Delphiniums>>
> 
> Hi Terry,
> I used to grow lovely delphiniums here in Tennessee when I lived on top of the 
> Cumberland Plateau - temps are consistently 10 degrees lower than valleys 
> because of 1000 foot greater elevation.  We also had sandy soil.  I grew them 
> against a south facing wall - but when we moved the wall in remodeling I was 
> never able to get them established again.  And here in Nashville it is 
> hopeless!  Brick-like soil and many days over 100, hot nights and humidity and 
> month long droughts.  I have heard of putting ice around the crowns of cool 
> loving plants every day but have never tried it.  So you see a heat zone rating 
> would be very useful here.
> 
> If a plant is rated heat zone 7, does that mean it won't grow here if the 
> number is higher?
> 
> Gale Link
> 
> --
> 
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