Tulipa sylvestris
totototo@telus.net (Mon, 20 Apr 2009 10:21:20 PDT)
On 19 Apr 2009, at 22:20, info@auchgourishbotanicgarden.org wrote:
Jim it may help you to add a little free lime in order to get flowering, my
bulbs are uber hardy down to anything thrown at them so far, e.g. - 20 C
this winter and they are up and happily at 'em again. Previously they went
'blind' on us but a raising of nutrition and pH from 4.5 seemed to help here
at any rate, might be worth a try. They have a lovely scent too.
It's unlikely that adding a little lime to your tulips made any perceptible
difference in soil pH. Most soils, thanks to their clay fractions, are strongly
buffered against pH changes.
I mix up potting soil using pH 4.5 soil as the starting point and aim toward
the classic pH 6.5 of "horticultural neutrality". I have to add a startlingly
large amount of lime to reach that goal.
However, adding smallish amounts of lime to the open garden temporarily
alleviates the calcium deficiencies often associated with acidic soils.
A reminder that dolomite is surprisingly insoluble. If you want fast correction
of calcium deficiency, pure calcium carbonate (aka "agricultural lime" or
"ground limestone") is the ticket. If you have a magnesium deficiency as well,
Epsom salts give faster results than dolomite, though I wouldn't put both down
at the same time.
Adding calcium to the garden also benefits the earthworm population. Earthworms
depend on free calcium ions in the soil to excrete waste CO2 as calcium
carbonate.
--
Rodger Whitlock
Victoria, British Columbia, Canada
Maritime Zone 8, a cool Mediterranean climate
on beautiful Vancouver Island