A busy day

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BryanW
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Re: A busy day

Post by BryanW » Thu Feb 22, 2018 11:17 am

You can get strong UV tubes Mike, they're used for desert reptiles.
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ralphrmartin
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Re: A busy day

Post by ralphrmartin » Thu Feb 22, 2018 4:58 pm

I have never bothered with lights - in my previous greenhouse, the propagator was under the bench, and the seedlings did OK there. They are now on the bench, so should get more light. If anything, I am worried I may need to shade them.

As for diurnal temperature swings - I did think of putting in timer switches too for the propagators. However, I suspect the heating cables wont necessarily keep the set 20C at night at this time of year, given the propagators are in the unheated part of the greenhouse, so there will probably be some significant temperature swings anyway. (That part of the greenhouse itself is swinging between about 2C and 19C at present, at least on sunny days with cold nights). The greenhouse is also controlled to be cooler at night then during the day in the warmer part of the year, although I hope many seeds will have germinated by then.

As for Lobivias and Rebutias needing more UV - strangely, it seems to be that Sulcorebutias are more affected by lack of UV, despite not coming from such high altitudes as some Lobivias / Mediolobivias, etc. Years ago I wrote an article for the journal about bad experiences of trying to grow Sulcorebutias in a double-glazed-with-safety-glass conservatory, and how they all etiolated.
Ralph Martin
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BryanW
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Re: A busy day

Post by BryanW » Thu Feb 22, 2018 5:03 pm

When I did lux tests last year I was quite suprised how low the light meter reads through double glazing :shock:
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ralphrmartin
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Re: A busy day

Post by ralphrmartin » Thu Feb 22, 2018 5:08 pm

Yes - and why I dont put any insulation up in winter...
Ralph Martin
http://www.rrm.me.uk/Cacti/cacti.html

Members visiting the Llyn Peninsula are welcome to come and see my collection.

My Field Number Database is now hosted by the BCSS: see
http://www.fieldnos.bcss.org.uk
Eric Williams
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Re: A busy day

Post by Eric Williams » Thu Feb 22, 2018 5:11 pm

Thanks Ralph for very interesting and comprehensive article on seed raising, Iam sure most of our forum friends will have found something in it to enhance their seed raising techniques. Cheers Eric
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