Light levels for growing SA bulbs - Simplified...

Sarah Hinckley sarahh@suiattle.net
Wed, 19 Oct 2016 09:42:48 PDT
Hello again,

So I guess nobody has information about this subject. So perhaps I can 
ask a simpler question.

Those of you that grow South African bulbs under glass in the Pacific 
Northwest (and I think there are a few of you out there!), do you add 
extra lights to compensate for our low light levels in the winter?

thanks a lot,

Sarah

On 10/17/2016 12:30 PM, Sarah Hinckley wrote:
> Hi folks,
>
> Here's a geeky question: what light levels (in lux or footcandles) are
> necessary to grow winter flowering South African bulbs?  I am growing
> these in a greenhouse in the (sometimes) gloomy Pacific Northwest
> winter.  The bulbs I am growing are various Moraeas, Geissorhiza
> radicans, Lachenalia aloides, Sparaxis tricolor.
>
> (plus Eucrosia mirabilis from Ecuador).
>
> Today, a cloudy and rainy day, the light level at about noon is about
> 4400 lux. Kinda low.
>
> I do have two big sodium halide greenhouse lights (250 or 400 w), plus
> various smaller shoplights with plant lightbulbs (CFLs up to 250 w),
> that I could use to supplement the light levels.
>
> Any recommendations?
>
> Sarah Hinckley
>
> Enumclaw, WA
> Zone 7a
>



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