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market-farming - Re: more greenhouse questions!

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Subject: Market Farming

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  • From: cathy mcgregor-smith <mcsmiths AT elgin.net>
  • To: market farming <market-farming AT franklin.oit.unc.edu>
  • Subject: Re: more greenhouse questions!
  • Date: Tue, 30 Jan 2001 21:44:47 -0500


is anyone concerned about nitrate accumulation when growing greens etc in low
light
conditions???

robert schuler wrote:

> A few more tidbits
> Double layer inflated plastic will eliminate wind damage but not help
> keeping plants
> warm in unheated house, in my county we have thousands of single layer
> houses for
> holding perennials that stay put by eliminating the ridge pipe, the plastic
> squeezes
> down tighter without the ridge, you can also make poly tie downs with 4"
> wide strips of
> plastic placed over the house at 10 ft intervals...
> Ventilation, if you use one year poly then just cut holes about 16"
> diameter in the
> sheet every 20 feet and leave a small amount uncut to act as a hinge then
> you can tape
> the hole partly shut on coldest nights this is only done in late spring
> before you
> remove the sheet all together, if you cut holes be prepared for water
> damage to any
> plants below.
> I use a double layer house with supplemental 100000 btu propane heat set at
> 35 deg. this
> really improves the quality of the crop but is costly even at the low
> temps,burning
> about 20 gallons a week but worthwhile because you must have quality if you
> are selling
> to a supermarket for example, greens or lettuce with tip burn from constant
> freezes just
> won't holdup in the market
>
> Infrared sheeting really makes a difference and at 25% more in cost, its
> very cost
> effective but it seems to be sensitive to damage more so than regular 4
> years poly, you
> will gain about two extra hours of stored warmth after sundown compared to
> regular
> poly.
> Use fans to keep constant air movement this will keep plants dry and
> prevent disease
> like botrytis, I have been using Patton brand 18" fans that are quite
> inexpensive and
> very powerful and have been running them nonstop in some cases for three
> years.
> Good luck to all
> Sunny Meadow Farm
> Bridgeton,NJ.
>
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