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
» Our Raised Garden Beds
by Turan Today at 9:00 pm

» hantavirus
by RJARPCGP Today at 7:42 pm

» anyone use fulvic acid before?
by Turan Today at 7:34 pm

» Fourth Year SFG in Canada
by Turan Today at 7:31 pm

» New England April 2018
by RJARPCGP Today at 6:22 pm

» Hello From Vermont
by RJARPCGP Today at 6:09 pm

» Northern California & Coastal Valleys - What are you doing this month?
by sanderson Today at 5:08 pm

» Salvia
by sanderson Today at 5:01 pm

» Bird's Eye View of Your Garden
by countrynaturals Today at 10:55 am

» How's the Weather Where You're At?
by countrynaturals Today at 10:41 am

» Recommended store bought compost - Photos of composts
by AtlantaMarie Today at 6:33 am

» 2nd year SFG in ND
by Robbomb116 Yesterday at 11:29 am

» Bird baths with solar powered pump
by sanderson Yesterday at 4:43 am

» Best drip system and timer?
by sanderson Yesterday at 4:02 am

» Hi from Buffalo
by sanderson Yesterday at 3:51 am

» Vermiculite on the out in Ontario?
by trolleydriver 4/17/2018, 11:37 pm

» N&C Midwest - April 2018–Snuck up on me!
by Scorpio Rising 4/17/2018, 7:27 pm

» CANADIAN REGION:what are you doing in April 2018?
by Kelejan 4/17/2018, 3:57 pm

» Adding Soil to Mel's Mix
by trolleydriver 4/17/2018, 8:38 am

» Hello from Kentucky!
by AtlantaMarie 4/17/2018, 7:31 am

» Hello from Linn County Oregon!
by AtlantaMarie 4/17/2018, 7:25 am

» Turan in the Western Mountains
by sanderson 4/17/2018, 2:22 am

» Goodbye to my SFG Raised Beds
by jimmy cee 4/16/2018, 11:03 pm

» Sanderson's Urban SFG in Fresno, California
by trolleydriver 4/16/2018, 8:40 am

» Mary Mary quite contrary, how does your garlic grow?
by sanderson 4/15/2018, 1:31 pm

» Fungus Among us?
by Kelejan 4/14/2018, 11:19 pm

» Butterfly Junction
by CapeCoddess 4/14/2018, 6:57 pm

» Senseless Banter...
by trolleydriver 4/14/2018, 5:29 pm

» Mel's Mix. How strong is your backbone?
by sanderson 4/14/2018, 3:42 pm

» 2018 SFG in Brooks, GA
by sanderson 4/14/2018, 3:14 pm

Google

Search SFG Forum

grow lights vs. natural sunlight

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 : 1147
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 : 15765
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 : 1147
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 : 4708
Join date : 2010-03-21
Age : 76
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 : 4708
Join date : 2010-03-21
Age : 76
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 : 1147
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

Back to top


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