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
» New England July 2017
by CapeCoddess Today at 4:27 pm

» Green Caterpillars
by BeetlesPerSqFt Today at 4:19 pm

» What I've learned this year
by CapeCoddess Today at 2:39 pm

» Some of our Gluten-free Cajun Recipes
by Cajun Cappy Today at 2:05 pm

» What are you eating from your garden today?
by hammock gal Today at 1:21 pm

» Healthy Meals
by hammock gal Today at 1:12 pm

» What Are These Little Guys?
by BeetlesPerSqFt Today at 11:28 am

» Senseless Banter...
by trolleydriver Today at 9:47 am

» Happy Birthday!!
by AtlantaMarie Today at 5:47 am

» Can I use a fabric pot for SFG?
by Fiz Yesterday at 11:48 pm

» Third Year SFG in Canada
by trolleydriver Yesterday at 10:25 pm

» How's the Weather Where You're At?
by countrynaturals Yesterday at 10:09 pm

» What do you know about making sauerkraut?
by CitizenKate Yesterday at 9:27 pm

» N & C Midwest; July 2017 !
by CitizenKate Yesterday at 9:21 pm

» PVC Watering Grid.
by CitizenKate Yesterday at 9:02 pm

» CANADIAN REGION: What are you doing in JULY 2017?
by Fiz Yesterday at 8:15 pm

» TrolleyDriver's Compost Thermometer
by audrey.jeanne.roberts Yesterday at 7:11 pm

» Your favorite watermelon and pumpkin
by audrey.jeanne.roberts Yesterday at 6:55 pm

» California's Drought
by AtlantaMarie Yesterday at 4:28 pm

» Caterpillars -Armyworm?
by CapeCoddess Yesterday at 4:17 pm

» Gardening in Central Pennsylvania, 3rd year SFG
by CapeCoddess Yesterday at 4:15 pm

» Just Completed my Garden.....What Should I Plant NOW!
by stealthmayhem Yesterday at 10:48 am

» 2017: First full year of SFGing in ND
by Robbomb116 Yesterday at 9:23 am

» Chive Omelet
by SQWIB Yesterday at 8:23 am

» who has chickens
by sanderson Yesterday at 2:33 am

» Spots on rosemary/marigolds
by AlwaysHotinFL 7/19/2017, 5:27 pm

» applying square foot gardening to container gardening! help!
by CapeCoddess 7/19/2017, 4:50 pm

» Turnips
by CapeCoddess 7/19/2017, 2:59 pm

» Squash vine Borers!!
by Scorpio Rising 7/18/2017, 9:56 pm

» Solar panels
by countrynaturals 7/18/2017, 4:34 pm

Google

Search SFG Forum

Fluctuating temps for germination

View previous topic View next topic Go down

Fluctuating temps for germination

Post  natsea on 5/5/2012, 4:34 pm

Hello. This is my first year gardening. My garden is in a zone 4 climate, so I started my seeds in a greenhouse about two weeks ago. I used a seed starting mix (vermiculite) in peat pots sitting in seed trays with the dome lids on each. I pour a little water in the tray and they keep the peat pots and soil moist. I am not using any grow lights or heat mats because it's not possible at this time, so I'm relying on the nice warm temps in the greenhouse during the day to do the work. I have looked at the germination charts in the back of the SFG book and my question is - will seeds still germinate well when the soil temps fluctuate a lot? I know most seeds need consistently warm soil temps and mine are getting nice warm soil temps in the greenhouse during the day (around 80 degrees), but at night, the temp drops considerably (to around 38 degrees lately). Will this fluctuation have a negative effect on my seeds? I planted them about 14 days ago and some are coming up (corn, squash, carrots, radish, cucumber), but others are not (mostly the lettuce). Thanks!
avatar
natsea

Posts : 1
Join date : 2012-05-05
Location : Cle Elum WA

View user profile

Back to top Go down

Re: Fluctuating temps for germination

Post  plantoid on 5/5/2012, 5:57 pm

Hi NATSEA,

Temperature variations do affect all sorts of seeds in their germination. Depending on the severity and frequency depends on if the seeds survive or not.

It is a complex subject to give you an accurate answer because of the variations that can apply.

Look in the charts of Mel's All New Square Foot Gardening 2006 edition on page 267 and there is a chart of the temps needed.

Lots of folks start their seeds germinating in a warm dark cupboard such as an airing cupboard or on top of a fridge or freezer and as soon as they show signs of breaking throught they move the seeds else where , but the temperature drop will still affect many very small plants .

50 oF for over 12 hrs will often kill off any just about to germinate seeds , if the temp drops to 45 oF just a few hours causes problems to many seeds and seedlings in the first few days of emergence .

I have been taking trays of small pots of seeds out the greenhouse and bringing them inside to sit on the dining table ( with my lasses blessing Laughing ) for we have had a few cool nights .

here in my location tonight is forecast as a sharp frost down to minus 3 oC ( 43 oF ) , I've covered everything in the greenhouse with crop fleece. I have brought in loads of susceptable plants and newly sown seeds even though I have a low grade back ground heater in the greenhouse as it will not out do any decent level of frost.
avatar
plantoid

Male Posts : 3699
Join date : 2011-11-09
Age : 66

View user profile

Back to top Go down

Re: Fluctuating temps for germination

Post  quiltbea on 5/5/2012, 9:35 pm

I agree wtih plantoid. The seeds need warmth to germinate. Can you bring them indoors at night?
avatar
quiltbea

Female Posts : 4682
Join date : 2010-03-21
Age : 75
Location : Southwestern Maine Zone 5A

View user profile

Back to top Go down

Re: Fluctuating temps for germination

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