which hydroponic system in garden greenhouse? - Growing in Greenhouses - International Cannagraphic Magazine Forums

german_aero · 02-20-2008, 09:55 AM

hallo,

I want to grow tomatoes in my garden greenhouse. Which hydroponic/aeroponic system is the best in this case?
The air temperatures in the greenhouse are from 60°F (night) to 80°F (day). I've read there are problems with the nutrients if the temp sways much and if its to hot. Is there a hydro system which works in a unheated outdoor greenhouse?

Rosy Cheeks · 02-20-2008, 12:26 PM

The problem with some hydroponic systems - such as DWC - is that heat makes the roots vulnerable to root rot when rez temps go high. High temps also lowers the oxygen level of the nutrient solution, and since the roots need highly oxygenated water when immersed in the solution (low oxygenated water also has lower penetration capacity, which lowers the roots nutrient uptake capacity), you will need to oxygenate the solution artificially. But 26.6º/80F is no problem in that sense.

Depending on the size of your greenhouse, you should know that the workload that goes with different systems is different.
DWC is a highly efficient system but demands a lot of attention. If you grow half a dozen or less plants this is a good way to get the maximum out of each plant.
Ebb and Flow is a less sensitive system, easy to use, so it suits larger grows where you spend less time on each plant.
NFT is a hybrid between the two, and - IMO - superior to both since it combines the best of DWC (high yields) with the best of Ebb and Flow (ease of use, low risk for root rot).

Wait...What? · 02-20-2008, 12:38 PM

tomatoes and peppers are not sensitive to dwc res temps like pot is (and I'm skeptical about that, too). i've grown them outdoors in dwc for years now.

depending on how you prune those tomato plants, your biggest issue may be head space. an indeterminate tomato variety can easily exceed 3 meters in a growing season.

i prune my tomato plants using the missouri method - sucker shoots pinched at the 2nd leaf, plants trained to a single stem (supported using the hanging string method) and plants packed in close together.

tomatoes will want about one twentieth the nitrogen that pot wants, and while pot wants magnesium, tomatoes want calcium. just keep in mind that blossom end rot is a calcium deficiency within the plant itself and not in the growing medium.

Rosy Cheeks · 02-20-2008, 03:14 PM

Wait... Wait? you're right, but I'm not sure german_aero actually wants to grow tomatoes, or "tomatoes". Which one is it, g_a? There are plenty of good garden web sites for tomato growing, such as Gardenweb.com:
https://forums.gardenweb.com/forums/tomato/
I don't think ICmag carries any sub-forums or threads about other cultivation than Cannabis, but it exists in some other pot forums.

german_aero · 02-21-2008, 09:09 AM

Thanks for your answers.
I really want to grow tomatoes (the red round vegetable). I think in the icmaq forum are many experts of hydroponic growing, thats the reason why I asked here.
I want to grow about 25 plants. So I think I need a pvc pipe system like GHE aeroflo:

Is this a kind of dwc?
Would such a pipe system work much better with misters instead of top-down "droppers" (seen on the pic)?

ahssensi · 02-21-2008, 11:12 PM

Most hydro greenhouses in my area grom tomatoes in either rockwool and slabs, coco bags or perlite bags drip fed run to waste.

Daemon · 04-19-2008, 03:03 AM

^^Same here. It is very common here to use rockwool slabs. I've also seen several local growers using those rotating gardens....

skunke · 04-19-2008, 10:40 PM

I had great sucess with homade aeroponic got amazing results in peak summer i got about 2 inches of growth every day It cost me around $500 to make with the pumps and all .It has 38 Plant sites And two diffrent resevours one for vegetables and the other for herbs.
Her some pics from earlier in the seoson.

skunke · 04-19-2008, 10:49 PM

Quote:

Originally Posted by german_aero

Thanks for your answers.
I really want to grow tomatoes (the red round vegetable). I think in the icmaq forum are many experts of hydroponic growing, thats the reason why I asked here.
I want to grow about 25 plants. So I think I need a pvc pipe system like GHE aeroflo:

Is this a kind of dwc?
Would such a pipe system work much better with misters instead of top-down "droppers" (seen on the pic)?

This is pretty much how my system works exept it has misters on the end of the feed lines, and the watter is allowd to freely drain back to the res.Couldnt recomend a better system!

04-24-2008, 10:59 PM

nice skunke
id say
consider using a system with a remote rez, that is out of the greenhouse that will keep the water temps down, ebb n flow, nft , aero , drip.
ive made a simple hybrid drip / nft system that was no expense besides the pump and nutes.the medium was lava rock i got for 20 dollares at the soil mart. my system drains outside the greenhouse and the rez is buried inthe ground keeping temps at 70 in the summer.

02-20-2008, 09:55 AM	#1
german_aero Member Join Date: Feb 2008 Posts: 71	which hydroponic system in garden greenhouse? hallo, I want to grow tomatoes in my garden greenhouse. Which hydroponic/aeroponic system is the best in this case? The air temperatures in the greenhouse are from 60°F (night) to 80°F (day). I've read there are problems with the nutrients if the temp sways much and if its to hot. Is there a hydro system which works in a unheated outdoor greenhouse?
	Quote

02-20-2008, 12:26 PM	#2
Rosy Cheeks dancin' cheek to cheek Join Date: Sep 2005 Location: Back, and to the left... back, and to the left... Posts: 2,560	The problem with some hydroponic systems - such as DWC - is that heat makes the roots vulnerable to root rot when rez temps go high. High temps also lowers the oxygen level of the nutrient solution, and since the roots need highly oxygenated water when immersed in the solution (low oxygenated water also has lower penetration capacity, which lowers the roots nutrient uptake capacity), you will need to oxygenate the solution artificially. But 26.6º/80F is no problem in that sense. Depending on the size of your greenhouse, you should know that the workload that goes with different systems is different. DWC is a highly efficient system but demands a lot of attention. If you grow half a dozen or less plants this is a good way to get the maximum out of each plant. Ebb and Flow is a less sensitive system, easy to use, so it suits larger grows where you spend less time on each plant. NFT is a hybrid between the two, and - IMO - superior to both since it combines the best of DWC (high yields) with the best of Ebb and Flow (ease of use, low risk for root rot). __________________ . "The time has come" the walrus said, "To talk of many things: Of shoes-and ships-and sealing wax Of cabbages-and kings- And why the sea is boiling hot And whether pigs have wings." Lewis Carroll Rosy's Mugshots and stuff... looking for the Ogre Blueberry Buds and some Wild Thoughts Overgrow! -Anything said by Rosy Cheeks is made up by a person trying to make himself seem important on the internet. The pictures in the gallery are photoshopped fakes.
	Quote

02-20-2008, 12:38 PM	#3
Wait...What? Senior Member Join Date: Apr 2007 Posts: 1,125	tomatoes and peppers are not sensitive to dwc res temps like pot is (and I'm skeptical about that, too). i've grown them outdoors in dwc for years now. depending on how you prune those tomato plants, your biggest issue may be head space. an indeterminate tomato variety can easily exceed 3 meters in a growing season. i prune my tomato plants using the missouri method - sucker shoots pinched at the 2nd leaf, plants trained to a single stem (supported using the hanging string method) and plants packed in close together. tomatoes will want about one twentieth the nitrogen that pot wants, and while pot wants magnesium, tomatoes want calcium. just keep in mind that blossom end rot is a calcium deficiency within the plant itself and not in the growing medium. Last edited by Wait...What?; 02-20-2008 at 12:39 PM..
	Quote

02-20-2008, 03:14 PM	#4
Rosy Cheeks dancin' cheek to cheek Join Date: Sep 2005 Location: Back, and to the left... back, and to the left... Posts: 2,560	Wait... Wait? you're right, but I'm not sure german_aero actually wants to grow tomatoes, or "tomatoes". Which one is it, g_a? There are plenty of good garden web sites for tomato growing, such as Gardenweb.com: https://forums.gardenweb.com/forums/tomato/ I don't think ICmag carries any sub-forums or threads about other cultivation than Cannabis, but it exists in some other pot forums. __________________ . "The time has come" the walrus said, "To talk of many things: Of shoes-and ships-and sealing wax Of cabbages-and kings- And why the sea is boiling hot And whether pigs have wings." Lewis Carroll Rosy's Mugshots and stuff... looking for the Ogre Blueberry Buds and some Wild Thoughts Overgrow! -Anything said by Rosy Cheeks is made up by a person trying to make himself seem important on the internet. The pictures in the gallery are photoshopped fakes.
	Quote

04-19-2008, 03:03 AM	#7
Daemon Member Join Date: Feb 2008 Posts: 450	^^Same here. It is very common here to use rockwool slabs. I've also seen several local growers using those rotating gardens.... __________________ JESUS NAILED TO WOODEN T'S CANNOT COMPETE WITH MY DISEASE
	Quote

02-21-2008, 09:09 AM	#5
german_aero Member Join Date: Feb 2008 Posts: 71	Thanks for your answers. I really want to grow tomatoes (the red round vegetable). I think in the icmaq forum are many experts of hydroponic growing, thats the reason why I asked here. I want to grow about 25 plants. So I think I need a pvc pipe system like GHE aeroflo: Is this a kind of dwc? Would such a pipe system work much better with misters instead of top-down "droppers" (seen on the pic)?
	Quote

02-21-2008, 11:12 PM	#6
ahssensi dedicated lurker Join Date: Feb 2006 Location: middle of nowhere Posts: 95	Most hydro greenhouses in my area grom tomatoes in either rockwool and slabs, coco bags or perlite bags drip fed run to waste.
	Quote

04-19-2008, 10:40 PM	#8
skunke Member Join Date: Mar 2008 Location: Canada Posts: 57	I had great sucess with homade aeroponic got amazing results in peak summer i got about 2 inches of growth every day It cost me around $500 to make with the pumps and all .It has 38 Plant sites And two diffrent resevours one for vegetables and the other for herbs. Her some pics from earlier in the seoson. Last edited by skunke; 04-19-2008 at 10:42 PM..
	Quote

04-24-2008, 10:59 PM	#10
fisher Guest Posts: n/a	nice skunke id say consider using a system with a remote rez, that is out of the greenhouse that will keep the water temps down, ebb n flow, nft , aero , drip. ive made a simple hybrid drip / nft system that was no expense besides the pump and nutes.the medium was lava rock i got for 20 dollares at the soil mart. my system drains outside the greenhouse and the rez is buried inthe ground keeping temps at 70 in the summer. Last edited by fisher; 04-24-2008 at 11:01 PM..
	Quote