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market-farming - Re: Hardening off and transplanting

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  • From: Peter Worsley <pwors AT svn.net>
  • To: market farming <market-farming AT franklin.oit.unc.edu>
  • Subject: Re: Hardening off and transplanting
  • Date: Thu, 30 Mar 2000 10:25:50 -0800


Mike Steinberg wrote:
>
> Would like some feedback on "hardening off" of transplants growen in a
> greenhouse and when to transplant to the field. Here in coastal Northern
> California, a hard frost in no longer a reality. Is it really necessary to
> harden off tranplants and if so, for how many days prior to transplanting
> and for how many hours per day-evening or day time? Is the general rule of
> thumb to tranplant when two sets of true leaves(not cotyledons) a good one
> to follow?
>
> Mike
> Flying Frog Farm
> Sebastopol,CA

I use cold frames with automatic openers set to begin raising the clear
plastic lids at around 70 degrees. 3 or 4 days prior to transplanting, I
leave the seedlings outside during the day, then move them outdoors all
day and night, then move them to the field into which they are to be
transplanted, covered only by a loose film of row cover. I also use row
covers for many types of seedlings, after transplanting, like tomatoes
and melons, until the plants become too large. In Point Reyes, which is
also in coastal Northern California, frost season is probably over, but
we have strong, cold, drying winds until mid or late May. Rowcovers
help. The 2 trueleaf rule works for me.

Peter Worsley




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