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Derek125

I've just ordered some lights for my Vitopod propagator to go into my heated greenhouse. I've also ordered a timer. How many hours and which hours should I have the lights on for?

Thanks

Pete8

Lights should be on for around 14-18 hrs per day.
Your plants still need 6-10 hours darkness a day too.
Timing is up to what suits you, so long as they get proper dark for 8-10hrs they'll be happy with those sort of timings.

Depends what you are growing, where you live and what aspect for your GH ?

A bit more info may result in some useful advice

Derek125

Pete: Thanks.

Phillipa: I live in Kent, the 6' x 8' greenhouse has a south aspect. Will be planting seeds for bedding plants and tomatoes.

Lyn

Why don’t you just wait for Natures Own, she will supply the right heat and light for anything you want to grow. You can’t plant any of out until May or June anyway. 

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Pete8
Lyn says:

Why don’t you just wait for Natures Own, she will supply the right heat and light for anything you want to grow. You can’t plant any of out until May or June anyway. 

See original post

 As far as light is concerned I very much agree.
It's all very well germinating seeds and growing them on in artificial conditions in a propagator, but as I found, if you have 100+ 6" tender plants in 3" pots in the middle of Feb you'll need a lot of lights and warmth to keep them going until frosts have passed
If it's a few houseplants or it's an experiment, then why not?

Derek125

Hi Lyn

Many thanks for your view.

Mike Allen

Hi Derek!  I have a twin fluoecent sealed light unit in my GH.  I use it only for illumination, when working inside.  Ordinary electric lighting is of litlle vale to assisting germination and plant culture.  As Lyn says, for what you intend growing, perhaps waithing for the natural time of germination etc is best.

There are several types of light sources available.  Specialised types not only illuminate but also act along with light spetrums.  If I may suggest, the internet so oftan comes to our aid.  Search Greenhouse lighting.  I think you will find a much more comprehensive decription.  All the best. Mike.

Lyn

There are a lot of people who think they’ll get an early start by usIng artificial heat and light, try it, you may be lucky if you’ve loads of greenhouse space to keep them In when you pot them on. 

Bedding plants and tomatoes can be sown in March, then they’re just about the right size to plant out end of May begining of June. 

Derek125

Thanks for the thoughts, clearly you're right about normal bedding plants but I want to experiment.

My lights have just arrived. Would people like me to report back later in the year on how I got on?

Thanks again,

Derek

Pete8

I'd be keen to hear how you get on Derek.

I tried a few years ago with an old set-up from my tropical fish tank. I had 4 x 50W T5 4ft tubes at the correct wavelength (i.e. mostly blue/red light) and also have a Vitopod and another propagator and a 4ftx2ft heated mat.

Plants grew well and quickly with little stretch but as I mentioned above I then had well over 100 plants to keep frost free and with sufficient light.
I sort of managed that, but the cosmos just got to silly heights and the tomatoes and peppers just got too big too quickly - then it's trying to get the canopy at an even height so that the light can penetrate - so some pots on bricks etc.

It was a lot of effort and to be honest I didn't see any particular benefits. The tomatoes started producing maybe a week or so earlier and the cosmos were about 4ft tall and flowering well in their pots by April.

Good luck!

Derek125

Hi Pete

Yeah, sounds likely, but I love experimenting. My greenhouse is heated to 50F so I'm able to have some exotic plants in bloom.

I'll report back!

Derek

Pete8
Derek125 says:

Hi Pete

Yeah, sounds likely, but I love experimenting. 

See original post

 Where would the world be without pioneers like us ;)

Last edited: 29 December 2017 12:35:14

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