starting seeds in a greenhouse

[DoubleDogFarm]

GardenRN,

Be careful with the transition. Don't just move them from a warm house into a unheated greenhouse.

Eric

[GardenRN]

will do, I'll probably do an abridged version of hardening off and try to move them out the last time on a warmer day. But thanks for the advice!

[organically_me]

I also will build a small (3' x 3' or so) compost pile in the GH when I start my seeds. The heat of the pile helps to control fluctuating nighttime temps.

Can you elaborate more on this. Will Allen ( Growing Power ) uses huge piles for large greenhouse. I'm interested in the smaller scale.
*******************************************************


Eric

Eric,
I found a photo. This is the GH at the end of the season, not the beginning, but I had no camera during springtime last year so it's all I have.
I built a roughly, 3.5' x 3.5' compost bin in the NE corner of my 10' x 12' GH. In approximately 6 weeks I'll start a *hot* compost pile with plenty of nitrogenous material in it to facilitate a quick start. It'll be plenty gassy for about 2 weeks but by the time I'm ready to start seeds it'll be decomposing rapidly, thus producing ambient heat. I'll use a fork to lift it a bit in the evening as I'm closing up the GH for the night. The introduction of fresh air into the pile at that time will help it to cook hotter overnight, thereby adding heat to the GH and saving me some worry about freezing nighttime temps. The most tender seedlings will sit on the planting shelf built over the compost pile; the warmest spot in the house.


[img]https://cubits.org/pics/2011-01-16/chelle/774ba0-250.jpg[/img]

[Bobberman]

does anyone out there start there seeds in a greenhouse? we have an unheated greenhouse that still gives us a good jump for starting seeds before we can plant them out.

how do you have your systems set up?

right now we have wide shelves above the beds(4 high, 18 inches apart) and they are 2 ft wide. there are gaps in each level to allow some light through. we can have a few thousand starts if need be but most of it is dedicated to propagation/overwintering plants.

I feel that the plants come out a lot more squat and sturdy compared to indoors even when the temps are warmer inside.

. ++++you can even start them two weeks earlier that you ususlly do if you add 100 gallons of water in 50 gallon black drums and some smaller plastic 20 gallon plastic boxes. I suggest the dark green plastic containers with lids. the water serves two purposes it heats the greenhouse at night and absorbs some of the hot heat during the day!. As long as you have a double glass or plastic this will keep the temperature a few degrees warmer at night. the 20 gallon plastic containers will heat up faster duing the day and give off more heat at night. the 50 gallon drums will gradually heat up and stay about 50 once the real cold nghts are gone! I usually insulate the bottom of the barrels or plastic containers by setting them on top of a foam or insulated base which stops heat from being lost to the floor! Solar is the only way to go! Even a stack of bicks or block set on top of a inslated floor will absorb heat and release it after the sun goes down! I put my cole crops like broccoli on the table top above the water containers so they are cooled some on hot days so they don't get stringy!

[sheeshshe]

can anyone give me advice on what to do this year? Normally I start the seeds indoors under a light and then when they get a little too big for the tiny cells I transfer them to larger containers and move them outside to a little greenhouse. (this green house I built is garbage and I want to build a new one) and then I bring them in EVERY NIGHT. and bring them back out every morning. it is super annoying LOL! esp since I"m doing this usually when there is still snow on the ground.

SO... I'd like to build a sturdier GH with actual glass. I plan on using the glass from this thing we have outside in the back. it would prob be more like a cold frame type thing (low to the ground like). how can I heat something small like that so that I don't have to bring them in at night? is that even possible? I'd love to just start them inside and then move them outside for good once they're big enough to go into the larger pots.


I usually start my seeds March 1st. my plants are usually pretty huge by the time they're in the ground :lol:n but our growing season is pretty short so I like them to get a good start.

[wordwiz]

wordwiz, they will work if you plan on putting them out fast. they outgrow the little containers fast. its basically to just make sure things germinate and you get plants out quick. they work good for herb seeds. the reason I use the 72 cell trays more is I can propagate small cuttings in them as well as start seeds.

Soil, an update. I sowed 120 super sugar snap peas on Jan. 26. As of this morning about 82 had sprouted, some within three days. There looks to be a few more about ready to break the soil. Some of the early ones are approaching 4" tall, which I presume is large enough to transplant.

Last year, I mixed up several 7-gallon pots of dirt, compost, and horse manure. I have a trench in the green house from where I buried hydro buckets and other containers in which I grew tomatoes. I plan on filling it with the stuff in the containers and once it thaws, transplant the peas. Based on the forecast, it may take a week or more which should really test the seedling tray's ability to sustain the peas.

Mike

[Chaesman]

Interesting thread.. Green House is suppose to arrive between the 8th (very excited about this) if I start the seeds in the green house do I still use trays? or do I just use cells and water frequently allowing to drain on ground?? Never used a green house before so this is all Greek to me

any advice is appreciated

thank you

[rainbowgardener]

I don't have a greenhouse, but if I did, I would still use the trays. To me, part of the point of the trays is to be able to bottom water... pour a little water into the tray and let the soil soak it up as needed. I think it is much more effective than watering from the top and avoids a lot of problems.

[Chaesman]

Just asking becasue I have pleanty of 72 cell trays but no bottom trays at the moment and was just wondering if 2 or 3 daily waterings could suffice.. I'll get bottom trays if absoulutly neccesary but they are not in the budget at this point in time so I would have to do some money hunting lol. (Oh and when I say plenty I mean pleanty I have access to a local farmers supply and he has in excess of 100,000 cell trays

[wordwiz]

Just asking becasue I have pleanty of 72 cell trays but no bottom trays at the moment and was just wondering if 2 or 3 daily waterings could suffice.. I'll get bottom trays if absoulutly neccesary but they are not in the budget at this point in time so I would have to do some money hunting lol. (Oh and when I say plenty I mean pleanty I have access to a local farmers supply and he has in excess of 100,000 cell trays

You can use something like a Sterilite container to hold the water. Last year, I had about 40 trays of plants that I watered once a week. Took maybe 90 minutes.

Mike

[soil]

all of our seedlings are open bottom, most of the time I only water once a day, sometimes every other day depending on weather.

[GardenRN]

you can also use those aluminum oven trays...they are pretty cheap.

I have a habit of checking the dollar store first for something to serve gardening functions. Today I got 150 popsicle sticks for $1 for marking my seeds. I think one pack will be enough, and you can always come up with a dollar.

[soil]

. Today I got 150 popsicle sticks for $1 for marking my seeds. I think one pack will be enough, and you can always come up with a dollar.

haha I do that too.

[lily51]

Today I arranged all my seed packets by when they need to be started in the greenhouse, from Feb. to April. Otherwise, something will get overlooked or get way too leggy by mid-May.

Your method looks a lot like mine, using trays to germinate, then transplant. Some I start in the house, some in the greenhouse.
I like to grow the seedlings for a while under a grow light at a few inches distance to keep them short. Spindly seedlings do not do well.

Right now there are geraniums, petunias, hibiscus, dusty miller, heliopsis, rosemary, german statice, plus lettuce, spinach and radishes up. Tomorrow I'm starting some perennials and herbs. Love this time of year.

[applestar]

You guys are all tempting me to do something! Anything!
I'm off to a slow start. I REALLY want to get some greenhouse sheeting and cover some of my raised beds with hoops this year for early start.

[Chaesman]

Like I mentioned the greenhouse is going to be a whole new experiance for me. When I set it up ititially should I just leave the ground bare? should I cover it with a tarp or something? Eventually when my son pours concrete for his shop he plans on ordering a little extra to pour a slap for our greenhouse but what should I do in the mean time?

Boy am I getting excited

[soil]

we got 200 free bricks from a building that was being torn down near us, we used that for the floor. I know people who just have gravel, chipped wood and those who use the ground to grow things in. the thing about the floor is you want it to have as much thermal mass as possible. this means in the winter it holds onto heat and in the summer it holds cool. this way the temps in the GH wont skyrocket in the day and drop dead at night( like most greenhouses people build)

[Chaesman]

Thanks for the info soil.. so a concrete slap that is in the works should be ample?? I'll just have to figure out something in the mean time.. Although wood mulch is only like 25 a truck load would that work for now or would the pests that come with it pose to much of a problem?

[soil]

you could always just leave it as the native dirt. nothing wrong with that.

the concrete should be fine.

[DoubleDogFarm]

The only thing I will add is crushed rock makes a good base for a concrete floor.

Eric

[lily51]

My greenhouse has a concrete path down the center from N-S, then the rest is limestone gravel about 10" thick where the benches are. Works great.

[wordwiz]

Mine is dirt and I like it. Found that if I am growing plants in containers or in hydro, I can bury them in the soil and help maintain a constant temp. I want to grow some peas, chard and broccoli in it starting this month, and I won't have to use containers. If I spill water, I don't have to worry about it - it soaks into the dirt and dries! I will never consider paving it with anything!

Mike

[DoubleDogFarm]

My beds run east west. Not much of a floor more of an aisle. About 3" of crushed 7/8 drain rock.
[img]https://i67.photobucket.com/albums/h300/eric_wa/Greenhouse%20Photos/DSC01954.jpg[/img]


Eric

[vermontkingdom]

I put pieces of cardboard on the dirt floor of my unheated greenhouse. Periodically, after they become soggy, soiled and mangled, they go into the compost bin.

Last fall I tried a compost pile in the greenhouse and the results were disappointing. I created an enormous mess in there along with lots of flies. I'm tempted to try it again this spring but hopefully the snow will continue to fall here until that temptation passes.

For gardeners, this has been one of the most discouraging winters we've had in a very long time. We had two large snowstorms earlier this week and today's coastal storm was supposed to stay south and just clip us with a dusting. I just came in from shoveling 6 inches of very heavy dusting with no end in sight. Gosh, we need a break.

[GardenRN]

DDF- so jealous of the setups in your pics. Still working on my greenhouse made of recycled windows. The frame is up and some windows are on! Just have to find time to finish more work. That and I think to make it fit right I'll have to take some panes out and make some of my own windows to go on the sides of the greenhouse.

[DoubleDogFarm]

GardenRN,

First, call me Eric. Have you posted pictures of your greenhouse project? I'd like to see it.

I purchased 11 storm windows from a consignment shop for $35.00. The front of the greenhouse ( south) has 6 windows and the east / west 2 each. All parts of the walls without glass are insulated. Ridged insulation. What's nice about storm windows is 2 screws and the window comes out of the frame. Its a frame within a frame. Ease of ventilation. Roof is made from sliding glass doors. This is tempered glass. Much safer overhead.

[img]https://i67.photobucket.com/albums/h300/eric_wa/Greenhouse%20May%2026%202010/DSC02216.jpg[/img]
[img]https://i67.photobucket.com/albums/h300/eric_wa/Greenhouse%20Photos/DSC01957.jpg[/img]

Eric

[GardenRN]

will post some pics this week Eric

I got all of mine for free. They were getting thrown away at a window replacement shop. These were the ones they tore out. But of course, they are all different sizes so it's a little....no, it's a lot of guess and check on my part as to making each wall come together.

[DoubleDogFarm]

will post some pics this week Eric

Great! looking forward. Now if I could only get lakngulf to post some pics.


Eric

[Chaesman]

Love the pics and heaing you can get the glass for free or cheap is nice to know... I do so want a permant structure with in the next 2 years so I guess it is time to start doing some window shopping literally.
Any how The portable that is suppose to arrive next week will have to suffice for the time being while we test the waters and formulate a plan for a permanant structure...

Boy that seems like a lot of glass to keep kleen lol

[tinlizzy]

I was wondering about the raised beds you have your seed beds sitting on. Are these filled with top soil or just any type of fill you have around. What type of lumber are you using for the bed frames? We have had a green house for my wife's plants for years. I would like to try and use the floor space to raise winter veggies.
Thanks

[wordwiz]

Keep it up guys and gals and maybe soon we will have an "under cover" gardening section. GHs, Hoop houses, Cold Frames, Row covers.

Even though I've only harvested maybe a dozen toms and a head of lettuce from my ghetto GH, I'm glad I built it. No way could I be thinking of starting 4,000 plants inside my house this winter/spring!

Mike

[DoubleDogFarm]

I was wondering about the raised beds you have your seed beds sitting on. Are these filled with top soil or just any type of fill you have around. What type of lumber are you using for the bed frames? We have had a green house for my wife's plants for years. I would like to try and use the floor space to raise winter veggies.
Thanks

Tin,

The beds initially filled with 50/50 sand and compost. Now they have a little potting mix and peat and...

I'm using Douglas fir, most common found in our lumber yards.

I tried different types of water heat storage and found it not to be much help. So I removed it all and install raised beds.

Eric