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Topic by Greenthumb posted 01-19-2010 10:58 AM 2295 views 0 times favorited 21 replies Add to Favorites Watch
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Greenthumb

2290 posts in 3696 days

01-19-2010 10:58 AM

Sigh…............

I spent the week-end putting left over poly, lacquer etc on my old barn board floor….............looks awesome. I also dug out quite a few wooden planks that I re-claimed from a century old home, cleaned them up and proceeded to make shelving for the greenhouse.

I aquired a bunch of old horse and buggy wrought iron hardware and cleaned that up,used the hardware for shelf brackets.

Then I gathered up most of my garden pots, trays, some antique wooden hand planes and tools and decorated it.

Then I put in 2 flourescent lights…................walked down the lane and just stared at it all night…...........just lovely.

Now my questions. I hung all my shelves along the walls and am now second guessing myself. Is it going to be too cold, that close to the glass?.................Should I have made (and willing to do so) a central stand in the middle of the greenhouse?

How cool can the greenhouse be at night?

How hot does it have to be during the day?

Do I need supplimental lighting?

When I open the 3’ x 4’ window from shop to greenhouse I only feel cold air coming into the shop, not warm air going into the greenhouse

TIA

-- just one more rock, and the garden is done ; )



View jroot's profile

jroot

5121 posts in 3507 days
hardiness zone 5a

01-19-2010 11:12 AM

I would worry about the outside as well, if the plants are really close. For that very reason, I would be tempted to have an aisle around the greenhouse with the grow table in the middle. I am thinking that you might avoid some of the temperature fluctuation. I may be incorrect though. Just my thoughts. ....

-- jroot ....... Southern Ontario .......... grow zone 5A ...................."Gardening is an exercise in optimism." ....... . . Author Unknown

View Greenthumb's profile

Greenthumb

2290 posts in 3696 days

01-19-2010 11:15 AM

just standing in the greenhouse I can “feel” the temperature change if I am near the windows.

any info on heat matts?..........where to buy?

-- just one more rock, and the garden is done ; )

View countrygal's profile

countrygal

364 posts in 3674 days

01-20-2010 09:42 AM

My plants have always been fine if I put a small heater in there at night.As long as the temps don’t get down to freezing.My heater is set to keep it at about 36-40 degrees.I keep the plants a few inches back from the poly walls so none can touch it.This is why I don’t start using my GH until the end of March.I have however sectioned off a spot with plastic drapped all around it with the heater in this smaller area,in which I keep all the plants together at night.I only find this necessary when I first start using the GH for the season and just have a limited amount of plants.When the GH starts to fill up I remove the temporary section and the heater is kept in the middle of the 10×12 GH.Works great for me

-- Southwestern Ontario Canada Zone5b

View StarrsWife's profile

StarrsWife

36 posts in 2960 days
hardiness zone 7

01-21-2010 05:40 PM

I am completely clueless about GH’s as I am still in the planning stages of mine, however I have been reading quite a bit about them lately. I read something interesting about using milk jugs and such (maybe even paint them black?) set in the GH to absorb heat during the day and release the heat at night…. the picture I seen was a pretty large size GH with 2-3 rows of plants and there were a whole row of black milk jugs the author says they were placed to receive max sunlight during the day….. It was interesting and thought you might look into it, as it may help a bit, and the best part is it’s free :)

And I have noticed that these xmas lights I am using as bottom heat really are putting off quite a bit of it, maybe you could experiment with stringing some of them up just to stave off a bit of the chill?

LOL I am such a noob, so if I sound ridiculous, please excuse me :)

-- Jessica~ Oklahoma zone 7 “A genius always presents himself as a fool” ~Anon.

View Orchids77's profile

Orchids77

268 posts in 3125 days
hardiness zone 5

01-21-2010 07:30 PM

I use 2 heaters in the greenhouse depending on how cold it is. I keep one near the rear and one by the door. I use the green house year round.I keep the temp around 45 deg. orchids like it cool.

-- Orchids77

View countrygal's profile

countrygal

364 posts in 3674 days

01-22-2010 08:21 AM

yes,the plastic milk and water jugs plan.i read that years ago when I got my first GH,so lined up water filled jugs like they said.They did feel warm during the day but still didn’t do much for heat at night,still used the heater.The trouble was,the next Spring all the jugs started to fall apart,the sun really destroys them fast.

orchids77
I am pretty sure mine would be fine with the heater all winter but the price of Hydro stops me.I am looking into some solar panels to store power,so I can run my heater off that.

-- Southwestern Ontario Canada Zone5b

View Greenthumb's profile

Greenthumb

2290 posts in 3696 days

01-22-2010 09:05 AM

ohhhhh to have some extra $$$$$ but this mere mortal has to find a way, with what I have.

Hydro/electrical bill here is scarey and no one seems to care. Every morning I have to come in, after everyone is gone and turn off the bathroom lights, the upstairs hall lights, bedroom lights, kitchen lights, living room lights, turn the TV off and turn the outside lights off. FIL leaves the big 52” TV on when he leaves to keep his dogs company, the light for the finch stays on 24/7…..why?......I have no idea? then the FIL heats his big pond….why?......I have no idea and then there are the pigeons with heaters, electrical vents/blowers and of course the 6 water heaters which are just light bulbs and that clothes dryer never stops….................and then people ask “Your not going to heat that greenhouse are you”

the black water jugs are out ….........maybe just leave the window open and plug in the electric oil heater? I read that if I leave the greenhouse in its natural temp being warm in the day and cool at night that Daffodils, tulips, etc will bloom, year after year after year but if you blast the heat to them they will only bloom once?

Guessing its going to be the same as all the other gardens…...try, experiment…..hope for success

Wheres Bob?

-- just one more rock, and the garden is done ; )

View Catspaw's profile

Catspaw

244 posts in 3673 days

01-22-2010 05:31 PM

questions…..hhmmmm….

Well, what you asked has to do with what you plant.

If the plants (like lettuce) tolerate the temps swings, no problem. If it’s something that likes it warm all the time….it’s a problem.

You have to plan and adjust accordingly. The green house will (generally) be warmer during and after a sunny day than outside for (generally) part of the time. It’s like a shock absorber and smoothes out the temp swings. A greenhouse would normally be used to extend your growing season, but, what you plant should coincide with the changes in temperature. Plant cold hardy things when it gets cold.

Shouldn’t need supplmental lighting unless you’re trying to accelerate the growth cycle. Although gray winters can really shorten the day. Check what you plant and see what light times they (it) requires.

If you open the window and cold air comes in from the green house, it means the greenhouse is cooler than the shop. Not trying to be a smarta$$, it’s just basic physics. If you left it open all the time, the temp would balance out (possibly cooling off the shop more than you want…..or warming the greenhouse from the shop.)

Thermal mass is an iffy subject. Water in jugs is fine unless you have long gray winters and it all freezes up. Then on a warm day it releases the stored cold temps (stored in the ice) and reducing your warming effects. Sand is NOT a good thermal mass as it is mostly quartz (glass….an insulator…..something that does NOT transfer heat well….as in take it in or give it up.) Stone is good. Black color is good. Maybe try passive heaters as in Mother Earth News….a black panel open at the top and bottom. Sun hits the panel, warm air rises and goes out the top, drawing in cool air at the bottom. Also stop all drafts. Air leakage will destroy any warming you get. Keep the warm air in and keep the cold air out….it’s good stuff (that’s why they remove it (normal air as opposed to an inert like argon) from between panels in a thermopane window….it transfers energy real well.) The ground is a good thermal mass….if you keep a section of it warm, it will reward you. Try weed clothe on the ground…(black of course.) The green house then protects that section of earth from the outside influences.

Milk jugs should deteriorate so they don’t stay in the ground (landfills) for, say, a billion years.

brain is empty. will look to fill it with some other nonsense to disgorge at some later time.

-- arborial reconfiguration specialist......Zone out....(USA 5)

View Greenthumb's profile

Greenthumb

2290 posts in 3696 days

01-23-2010 07:21 AM

I started seeds,...........spinach (seems it was still growing in the garden after the first frost) rosemary, parsley. basil…......and a few tomatoes. I can keep them in the shop untilthey get going and then move them.

I have an electric oilfilled radiant heater but I plug it into a heavy dutry extension cord and the cord gets warm so I amsomewhat reluctant to walk away from it.

any suggestions on a heater?

does anyone know where to get heat pads?

-- just one more rock, and the garden is done ; )

View Iris43's profile

Iris43

3811 posts in 3506 days
hardiness zone 5a

01-23-2010 07:58 AM

Greenthumb, I know a few people who have the heater pad from an old water bed that they use for seed starting. And some cover an ordinary heating pad with plastic to use.(small put doable) I start my seeds on top of my gas fireplace as the seeds usually don’t require light to germinate.
If you want to go more professional, any seed catalog that has recently arrived has heating pad for seed starting….Vesey’s, Stokes, McConnells, etc. You might find them at a nursery if any are open in your region.

-- 'To plant a Garden is to believe in Tomorrow'

View countrygal's profile

countrygal

364 posts in 3674 days

01-23-2010 08:03 AM

My GH has a floor so your situation might be different.I use what is called a milk house heater,and I have a small ceramic heater,both have fans.I can use either of them and both work fine.I don’t find a need to use heat mats.

-- Southwestern Ontario Canada Zone5b

View Greenthumb's profile

Greenthumb

2290 posts in 3696 days

01-23-2010 08:32 AM

I went to every nursery near me and only one was open and it was just about devoid of everything but plastic flowers. I was tempted to but the plastic stuff and fake it.

Thanks for the info Iris.

The older I get, the longer winter gets.

I long for spring

sunflower1>

-- just one more rock, and the garden is done ; )

View Radicalfarmergal's profile

Radicalfarmergal

4312 posts in 3139 days
hardiness zone 5b

01-23-2010 04:49 PM

Greenthumb, your beautiful garden photo is making me long for spring too.

-- "...I have nothing against authorities as such; I am only in favor of putting a question mark after just about everything they say." Ruth Stout

View Orchids77's profile

Orchids77

268 posts in 3125 days
hardiness zone 5

01-23-2010 07:16 PM

Just 55 more days and it will be SPRING !!! Yey

-- Orchids77

View MsDebbieP's profile

MsDebbieP

14694 posts in 3877 days
hardiness zone 5b

01-24-2010 05:14 AM

oooh look at all that colour….... “patience is a virture; patience is a virtue; patience is a virtue” .. yah yah…

-- - Debbie, SW Ontario Canada (USDA Hardiness Zone: 5a)

View Greenthumb's profile

Greenthumb

2290 posts in 3696 days

01-24-2010 07:05 AM

Photobucket>

-- just one more rock, and the garden is done ; )

View Greenthumb's profile

Greenthumb

2290 posts in 3696 days

01-24-2010 07:13 AM

Photobucket>

Photobucket>

and then there is the ruthless reality of today

Photobucket>

-- just one more rock, and the garden is done ; )

View jroot's profile

jroot

5121 posts in 3507 days
hardiness zone 5a

01-24-2010 07:43 AM

I gather that you are going to get “hammered” again today with yet another winter storm. Here, we are going to get our streets washed with heavy rain.

-- jroot ....... Southern Ontario .......... grow zone 5A ...................."Gardening is an exercise in optimism." ....... . . Author Unknown

View Greenthumb's profile

Greenthumb

2290 posts in 3696 days

01-24-2010 08:01 AM

I heard it was supposed to rain today and for what its worth….....I pray it stays frozen. When it rains the packed snow becomes an ice road , just waiting to swallow up vehicles.

-- just one more rock, and the garden is done ; )

View Iris43's profile

Iris43

3811 posts in 3506 days
hardiness zone 5a

01-24-2010 08:20 AM

Oh! Very nice pictures of your flowers, Greenthumb. :-) Even the picture of the snow is outstanding.

-- 'To plant a Garden is to believe in Tomorrow'

View Bon's profile

Bon

7374 posts in 3657 days
hardiness zone 5a

01-24-2010 09:41 AM

Amazing what just a few weeks can do to our yards and gardens Greenthumb.Nice pics.

-- Bon,Hastings,Ont.....zone 5a....Always room for one more

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