Square Foot Gardening Forum

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.


Search
 
 

Display results as :
 

 


Rechercher Advanced Search

Latest topics
» Baker Creek's Seed Bank Store in Petaluma, CA
by trolleydriver Today at 2:46 pm

» Northern California & Coastal Valleys - What are you doing this month?
by sanderson Today at 1:59 pm

» Senseless Banter...
by sanderson Today at 1:56 pm

» Food Dehydrators
by sanderson Today at 1:21 pm

» 2017 Burpee seeds are already on display at HD
by MrBooker Today at 5:13 am

» Green Ice Leaf Lettuce
by MrBooker Today at 4:46 am

» New England January 2017
by Scorpio Rising Yesterday at 10:11 pm

» Gardening Australia
by Scorpio Rising Yesterday at 10:05 pm

» New Forum Feature
by Scorpio Rising Yesterday at 9:56 pm

» Microgreens Gardening
by yolos Yesterday at 9:45 pm

» Hi from Acworth GA
by AtlantaMarie Yesterday at 9:40 pm

» N & C Midwest: January 2017!
by Scorpio Rising Yesterday at 6:14 pm

» California's Drought
by sanderson Yesterday at 5:46 pm

» Making Smoothies
by CapeCoddess Yesterday at 4:05 pm

» CANADIAN REGION: What are you doing January 2017
by trolleydriver Yesterday at 10:54 am

» Winter Sowing vs. Winter Growing
by has55 Yesterday at 3:32 am

» heirloom seed companies around a lot of the world
by ralitaco 1/18/2017, 10:58 pm

» What about ink on newspaper and cardboard for mulch?
by Scorpio Rising 1/18/2017, 9:23 pm

» Turan in the Western Mountains
by Turan 1/18/2017, 7:20 pm

» How's the Weather Where You're At?
by BeetlesPerSqFt 1/18/2017, 10:22 am

» Third Year SFG in Canada
by trolleydriver 1/18/2017, 9:23 am

» Holy snow Batman!
by AtlantaMarie 1/18/2017, 8:13 am

» 2017 SFG Adventures in Hampstead, NC
by ralitaco 1/17/2017, 11:23 pm

» Daikon radishes?
by Scorpio Rising 1/17/2017, 9:49 pm

» Anyone want walking onions??
by Scorpio Rising 1/17/2017, 9:22 pm

» How much to plant?
by trolleydriver 1/17/2017, 2:48 pm

» January: What to plant in Northern California and Central Valley areas
by countrynaturals 1/17/2017, 2:22 pm

» Feedback for my 2017 garden plan
by sanderson 1/17/2017, 2:00 pm

» What are you eating from your garden today?
by countrynaturals 1/17/2017, 1:49 pm

» Show us your kitchen compost container
by CapeCoddess 1/17/2017, 1:23 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?

landarch

Posts : 1124
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.

sanderson

Forum Moderator Certified SFG Teacher

Female Posts : 12658
Join date : 2013-04-21
Age : 68
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

landarch

Posts : 1124
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.

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.

quiltbea

Female Posts : 4616
Join date : 2010-03-21
Age : 74
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?

quiltbea

Female Posts : 4616
Join date : 2010-03-21
Age : 74
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.

landarch

Posts : 1124
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.

Marc Iverson

Male Posts : 3636
Join date : 2013-07-05
Age : 55
Location : SW Oregon

View user profile

Back to top Go down

Re: grow lights vs. natural sunlight

Post  Sponsored content Today at 3:08 pm


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