Square Foot Gardening Forum
[table bgcolor=#000000 height=275][tr][td]

Hello Guest!
Welcome to the official Square Foot Gardening Forum.
There's lots to learn here by reading as a guest. However, if you become a member (it's free, ad free and spam-free) you'll have access to our large vermiculite databases, our seed exchange spreadsheets, Mel's Mix calculator, and many more members' pictures in the Gallery. Enjoy.


[/td][/tr][/table]
Search
 
 

Display results as :
 

 


Rechercher Advanced Search

Latest topics
» CANADIAN REGION: What are you doing in December 2017
by Scorpio Rising Yesterday at 9:31 pm

» Julia Child's French Onion Soup
by trolleydriver Yesterday at 8:37 pm

» Northern California & Coastal Valleys - What are you doing this month?
by countrynaturals Yesterday at 7:18 pm

» jalapeno variety question?
by Scorpio Rising Yesterday at 5:58 pm

» How's the Weather Where You're At?
by Scorpio Rising Yesterday at 5:56 pm

» December: What to plant in Northern California and Central Valley areas
by countrynaturals Yesterday at 5:17 pm

» Indoor Container Garden - City Living
by countrynaturals Yesterday at 4:45 pm

» who has chickens
by countrynaturals Yesterday at 3:49 pm

» Air Fryer! HELP!
by countrynaturals Yesterday at 12:05 pm

» Spring Fever Anyone?
by plantoid Yesterday at 10:59 am

» has55's R & D Journey
by trolleydriver Yesterday at 8:00 am

» California's Drought
by countrynaturals 12/16/2017, 10:26 pm

» What are you eating from your garden today?
by Roseinarosecity 12/16/2017, 10:03 pm

» Sweet Potatoes
by No_Such_Reality 12/16/2017, 5:36 pm

» Areogardening
by trolleydriver 12/16/2017, 1:45 pm

» 1st Seed Catalog Arrived :)
by countrynaturals 12/16/2017, 11:55 am

» What's Up? Yukon gold potatoes!
by saganco 12/16/2017, 11:11 am

» N&C MW; Deep Winter December/January 2017-2018
by Scorpio Rising 12/15/2017, 7:57 pm

» Garden Clean-Up/Preparation
by Scorpio Rising 12/15/2017, 7:53 pm

» CarbSmart (tm) Potatoes
by sanderson 12/15/2017, 1:41 pm

» Third Year SFG in Canada
by Kelejan 12/15/2017, 7:51 am

» Happy Birthday!!
by Scorpio Rising 12/14/2017, 10:42 pm

» Butterfly Junction
by countrynaturals 12/14/2017, 11:01 am

» New England December 2017
by AtlantaMarie 12/14/2017, 6:32 am

» Sauerkraut & fermenting veggies
by brianj555 12/13/2017, 5:28 pm

» Tomato Questions
by sanderson 12/13/2017, 3:04 pm

» Mid-South: December 2017
by AtlantaMarie 12/13/2017, 8:24 am

» New Composter - Need Help Filling Correctly
by saganco 12/12/2017, 9:10 pm

» December Avatar: 'Tis The Season!
by sanderson 12/12/2017, 2:29 pm

» The Research Journey:cardboard covering of newly planted seeds
by saganco 12/12/2017, 1:15 pm

Google

Search SFG Forum

grow lights vs. natural sunlight

View previous topic View next topic Go down

grow lights vs. natural sunlight

Post  landarch on 3/31/2014, 10:00 pm

My tomatoes are very quickly out-growing my grow-light set-up.  With warmer weather ahead I can start hardening the plants off by moving them outside during the day.  I've read that tomato seedlings need about 16 hours under the grow light at a time.  If they get 8 or so hours of natural daylight, do I still need to put them under grow lights for another 8 hours when I bring them in at night?
avatar
landarch

Posts : 1145
Join date : 2012-01-22
Location : kansas city

View user profile

Back to top Go down

Re: grow lights vs. natural sunlight

Post  sanderson on 4/1/2014, 3:56 am

I hope someone can help answer this. I was so irregular with my lights and they still grew. Someone on the Forum used stacks of books to get the lights higher. Low tech.
avatar
sanderson

Forum Moderator Certified SFG Teacher

Female Posts : 15086
Join date : 2013-04-21
Age : 69
Location : Fresno CA Zone 8-9

View user profile

Back to top Go down

Re: grow lights vs. natural sunlight

Post  landarch on 4/1/2014, 10:05 am

me too...I would like to know if the plants get sunshine for 8 hours do they need to go back under the grow lights for another 8 at night.

EDIT:  I just heard back from a local seed company...they though that seedlings would not require additional grow lights once they are hardened off and are getting full day natural sunlight.

Now, if the gale force winds would just stop I can set some plants outside.


Last edited by landarch on 4/1/2014, 10:18 am; edited 1 time in total
avatar
landarch

Posts : 1145
Join date : 2012-01-22
Location : kansas city

View user profile

Back to top Go down

Re: grow lights vs. natural sunlight

Post  mapspringer on 4/1/2014, 10:16 am

I think ideally you would phase down the number of hours as you're hardening them off.  S.a. if outside for 8 hours, put them back under lights for 4, then 3, then 2, and so forth until they're in the ground.
avatar
mapspringer

Male Posts : 66
Join date : 2012-04-01
Location : Middle Tennessee

View user profile

Back to top Go down

Re: grow lights vs. natural sunlight

Post  quiltbea on 4/1/2014, 4:15 pm

If your plants are outside for several sunlight hours, they just need darkness at night to rest.
But usually when hardening off, you start with one hour in the shade the first day, then increase the time the 2nd day, then into the sunlight a couple hours before moving them to the shade, always increasing sunlight and taking the plants indoors at night away from possible cold temps.  
If you bring them in early, put them under the lights.  Keep the same schedule you had before hardening off.  Under the lights if only outdoors a couple hours but in darkness at night from 11 pm to 7 am.
You need to give them additional growlight time during this period if they are not getting full term sunlight.
avatar
quiltbea

Female Posts : 4695
Join date : 2010-03-21
Age : 75
Location : Southwestern Maine Zone 5A

View user profile

Back to top Go down

Re: grow lights vs. natural sunlight

Post  quiltbea on 4/1/2014, 4:20 pm

I don't have my lights suspended from the ceiling but stacked on old VHS tapes, bricks, packing foam,  plastic containers.....anything that works.    I increase more on one side or the other as needed for closeness to the tops of the seedlings.  Works great.

See how my lights are angled for better light?
avatar
quiltbea

Female Posts : 4695
Join date : 2010-03-21
Age : 75
Location : Southwestern Maine Zone 5A

View user profile

Back to top Go down

lights

Post  landarch on 4/1/2014, 6:11 pm

Quiltbea...here's my problem, and I knew it when I was setting everything up.

The lights I have (T5 four-bulb) have a funky mounting wire...it wastes about 6-7" of vertical space...couple that with some limitations on the adjustability of my metal shelving system.























Here is my entire shelf...lights are as high as they will go with my set-up.

Here is older set-up...cheaper 4' shop lights from Walmart...lighter weight and easier to adjust for height.
avatar
landarch

Posts : 1145
Join date : 2012-01-22
Location : kansas city

View user profile

Back to top Go down

Re: grow lights vs. natural sunlight

Post  Marc Iverson on 4/1/2014, 7:21 pm

@sanderson wrote:I hope someone can help answer this. I was so irregular with my lights and they still grew. Someone on the Forum used stacks of books to get the lights higher. Low tech.

Awesome though! heheh! I love it when people find some clever and/or funky way to something on the cheap.
avatar
Marc Iverson

Male Posts : 3638
Join date : 2013-07-05
Age : 56
Location : SW Oregon

View user profile

Back to top Go down

Re: grow lights vs. natural sunlight

Post  Sponsored content


Sponsored content


Back to top Go down

View previous topic View next topic Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum