Posted by Deuteros on February 28, 2008, 8:29 pm
I'm growing some tomato plants under a 400 watt metal halide lamp. They
are about three weeks old and several are a few days from blooming. Right
now I have them under 18 hours of light and 6 hours of darkness.
Should I continue to keep them under the MH lamp or should I switch over
to my high pressure sodium lamp? Also, should I change the light schedule
at all?
Posted by Father Haskell on February 29, 2008, 12:19 pm
> I'm growing some tomato plants under a 400 watt metal halide lamp. They
> are about three weeks old and several are a few days from blooming. Right
> now I have them under 18 hours of light and 6 hours of darkness.
> Should I continue to keep them under the MH lamp or should I switch over
> to my high pressure sodium lamp? Also, should I change the light schedule
> at all?
Tomatoes = long day, since they bear fruit during summer.
I'd switch to HPS anyway, since it costs less to run per
usable lumen.
Posted by Billy on February 29, 2008, 12:34 pm
In article
> > I'm growing some tomato plants under a 400 watt metal halide lamp. They
> > are about three weeks old and several are a few days from blooming. Right
> > now I have them under 18 hours of light and 6 hours of darkness.
> >
> > Should I continue to keep them under the MH lamp or should I switch over
> > to my high pressure sodium lamp? Also, should I change the light schedule
> > at all?
>
> Tomatoes = long day, since they bear fruit during summer.
> I'd switch to HPS anyway, since it costs less to run per
> usable lumen.
My tomatoes first flower around the summer solstice. After that they set
fruit and flower some more as the days begin to shorten.
--
Billy
Impeach Pelosi, Bush & Cheney to the Hague
http://rachelcorriefoundation.org/site/
http://en.wikipedia.org/wiki/Movement_to_impeach_George_W._Bush
Posted by Father Haskell on February 29, 2008, 4:35 pm
> In article
> > > I'm growing some tomato plants under a 400 watt metal halide lamp. They
> > > are about three weeks old and several are a few days from blooming. Right
> > > now I have them under 18 hours of light and 6 hours of darkness.
> > > Should I continue to keep them under the MH lamp or should I switch over
> > > to my high pressure sodium lamp? Also, should I change the light schedule
> > > at all?
> > Tomatoes = long day, since they bear fruit during summer.
> > I'd switch to HPS anyway, since it costs less to run per
> > usable lumen.
> My tomatoes first flower around the summer solstice.
Which would be close to 18-6.
> After that they set
> fruit and flower some more as the days begin to shorten.
Up until the equinox, with declining production until killing
frost?
> --
> Billy
> Impeach Pelosi, Bush & Cheney to the
Haguehttp://rachelcorriefoundation.org/site/http://en.wikipedia.org/wiki/Movement_to_impeach_George_W._Bush
Posted by Billy on February 29, 2008, 5:01 pm
In article
> > In article
> >
> > > > I'm growing some tomato plants under a 400 watt metal halide lamp. They
> > > > are about three weeks old and several are a few days from blooming.
> > > > Right
> > > > now I have them under 18 hours of light and 6 hours of darkness.
> >
> > > > Should I continue to keep them under the MH lamp or should I switch
> > > > over
> > > > to my high pressure sodium lamp? Also, should I change the light
> > > > schedule
> > > > at all?
> >
> > > Tomatoes = long day, since they bear fruit during summer.
> > > I'd switch to HPS anyway, since it costs less to run per
> > > usable lumen.
> >
> > My tomatoes first flower around the summer solstice.
>
> Which would be close to 18-6.
>
Ay, Father, but we dunna all have the luck to live in, Nova Scotia isn't
it?
--
Billy
Impeach Pelosi, Bush & Cheney to the Hague
http://rachelcorriefoundation.org/site/
http://en.wikipedia.org/wiki/Movement_to_impeach_George_W._Bush
XML site map
> are about three weeks old and several are a few days from blooming. Right
> now I have them under 18 hours of light and 6 hours of darkness.
> Should I continue to keep them under the MH lamp or should I switch over
> to my high pressure sodium lamp? Also, should I change the light schedule
> at all?