Do plants need a break from the light?
Planted Tank Forums
Your Tanks Image Hosting *Tank Tracker * Plant Profiles Fish Profiles Planted Tank Guide Photo Gallery Articles

Go Back   The Planted Tank Forum > Specific Aspects of a Planted Tank > Plants


Reply
 
Thread Tools Display Modes
Old 12-23-2011, 05:57 AM   #1
Da Plant Man
Nerd Alert.
 
Da Plant Man's Avatar
 
PTrader: (74/100%)
Join Date: Apr 2010
Location: NW Montana
Posts: 5,708
Default

Do plants need a break from the light?


I am trying to think of ways I can make my plants grow faster. So far I am already going to be saturating the air with co2 via my dad's brew, and extending the light period.

Just curious though, do plants need 'rest'? or could I keep the lights on 27/7?

Thanks!
__________________

RAOK CLUB #12
Wabi-kusa Pimp #1
"99% of the time, a fish tank with plants will fail. Once you start a dedicated planted tank with fish, then you begin to succeed." - Geniusdudekiran
Da Plant Man is online now   Reply With Quote
Sponsored Links
Advertisement
 
Old 12-23-2011, 06:06 AM   #2
Patriot
Planted Tank Enthusiast
 
Patriot's Avatar
 
PTrader: (1/100%)
Join Date: Dec 2010
Location: Spokane, Washington
Posts: 899
Send a message via Skype™ to Patriot
Default

Plants do need rest, or more accurately a dark period. Plants do not stop functioning in the dark but start a different process altogether. Plants use oxygen and release CO2 in the dark. They also use whatever energy that was created created during the light phase.

Leaving lights on for 24/7 will only leading to algae.
__________________
Proudly Serving in the United States Armed Forces, 2009-Present
SUNSUN PIMP #41
The Fraternity of Dirt #50
Just because its dirt doesn't make it low tech.
What Can Dirt Do For You?
Nikon Club Member #35
Patriot is online now   Reply With Quote
Old 12-23-2011, 06:29 AM   #3
Da Plant Man
Nerd Alert.
 
Da Plant Man's Avatar
 
PTrader: (74/100%)
Join Date: Apr 2010
Location: NW Montana
Posts: 5,708
Default

Forgot to mention; this is for my emersed tank. Algae is not an issue whatsoever.

That makes sense though. I forgot that they comsume O2 at night. Then what is the 'maximum' time the light could be left on? Within reason of course. Not like there is a set time limit.
__________________

RAOK CLUB #12
Wabi-kusa Pimp #1
"99% of the time, a fish tank with plants will fail. Once you start a dedicated planted tank with fish, then you begin to succeed." - Geniusdudekiran
Da Plant Man is online now   Reply With Quote
Old 12-23-2011, 06:38 AM   #4
150EH
Planted Tank Guru
 
150EH's Avatar
 
PTrader: (27/100%)
Join Date: Dec 2004
Location: Churchton, Maryland
Posts: 5,370
Default

I think plants absolutely need a rest period but not more than 8 hours, they need time to go through the natural cycles and rest is a definite part of the cycle. The rest may not have to be lights out and you should read about gardening in the Arctic circle, gardeners in Alaska love there fresh salads, so when their 30 day growing window opens they grow, grow, grow and the fact that it never gets absolutely dark helps them to grow large plants quickly, so I think you could get good info from the great white north.
150EH is offline   Reply With Quote
Old 12-23-2011, 06:38 AM   #5
Patriot
Planted Tank Enthusiast
 
Patriot's Avatar
 
PTrader: (1/100%)
Join Date: Dec 2010
Location: Spokane, Washington
Posts: 899
Send a message via Skype™ to Patriot
Default

you could try 14 or 16 hours with 8 hours of down time.
__________________
Proudly Serving in the United States Armed Forces, 2009-Present
SUNSUN PIMP #41
The Fraternity of Dirt #50
Just because its dirt doesn't make it low tech.
What Can Dirt Do For You?
Nikon Club Member #35
Patriot is online now   Reply With Quote
Old 12-23-2011, 06:48 AM   #6
HypnoticAquatic
Wannabe Guru
 
HypnoticAquatic's Avatar
 
PTrader: (18/100%)
Join Date: Feb 2010
Location: arvada, co
Posts: 1,289
Default

they do need rest! in other grow areas the longest light cycle is 18 on 6 off but just watch how your plants respond they do speak if they are happy or not so adjust accordingly
HypnoticAquatic is offline   Reply With Quote
Old 12-23-2011, 07:00 AM   #7
Patriot
Planted Tank Enthusiast
 
Patriot's Avatar
 
PTrader: (1/100%)
Join Date: Dec 2010
Location: Spokane, Washington
Posts: 899
Send a message via Skype™ to Patriot
Default

You should give CO2 and nutrients in the right ratio to longer lights too for the plants to use to grow faster. Co2 shouldn't be a problem if its an emerged tank.
__________________
Proudly Serving in the United States Armed Forces, 2009-Present
SUNSUN PIMP #41
The Fraternity of Dirt #50
Just because its dirt doesn't make it low tech.
What Can Dirt Do For You?
Nikon Club Member #35
Patriot is online now   Reply With Quote
Old 12-23-2011, 07:31 AM   #8
Capsaicin_MFK
Planted Tank Enthusiast
 
Capsaicin_MFK's Avatar
 
PTrader: (16/100%)
Join Date: Nov 2009
Location: Minnesota
Posts: 776
Default

I always do a 16 hour photoperiod for my emersed stuff. I haven't really noticed a difference in adding a little co2 into the sealed tank.
Capsaicin_MFK is offline   Reply With Quote
Old 12-23-2011, 07:34 AM   #9
Da Plant Man
Nerd Alert.
 
Da Plant Man's Avatar
 
PTrader: (74/100%)
Join Date: Apr 2010
Location: NW Montana
Posts: 5,708
Default

I shall try to leave them on longer. See what effects it has. Do some testing

It's also no bid deal if I inject co2 or not. Just using what resources my dad drinks....erm....has...
__________________

RAOK CLUB #12
Wabi-kusa Pimp #1
"99% of the time, a fish tank with plants will fail. Once you start a dedicated planted tank with fish, then you begin to succeed." - Geniusdudekiran
Da Plant Man is online now   Reply With Quote
Old 12-24-2011, 01:10 AM   #10
FishFarmer
Planted Member
 
FishFarmer's Avatar
 
PTrader: (1/100%)
Join Date: Feb 2007
Location: "The Old Line State"
Posts: 231
Default

To answer your question, yes and no. You can grow most plants with lights on 24-7--we do that with some plants at my school (with mostly C4 grasses like corn, sudangrass, phrag, etc) . Also, take for example plants growing in far northern regions of the world, such as Alaska. In their summer, they get 24 (or close to 24) hours of daylight per day, and plants grow like crazy (Alaska is famous for produce huge pumpkins). But with other plants it will not work. Take for example, CAM plants, which require darkness to fix carbon.

A day-night cycle is beneficial and necessary to regulate some plant physiological functions, such as flowering. And I'm sure there are also some other functions in plants which are controlled by a dark and light period. So to answer your question, yes, many plants can be grown in 24 hours of light, while some can't, and others (most) will benefit from a day/night cycle. So in general, it is best to grow plants with some sort of dark period. Also, with aquarium plants, leaving the light on for 24 hours is just asking for an algae problem.
__________________
Andy

If you ate or wore clothes today, thank a farmer
FishFarmer is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 10:26 AM.


Powered by vBulletin®
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright Planted Tank LLC 2012