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
» Northern California & Coastal Valleys - What are you doing this month?
by Kelejan Today at 12:44 am

» CANADIAN REGION: What are you doing February 2017?
by Kelejan Today at 12:42 am

» N&C Midwest: February 2017
by CitizenKate Yesterday at 11:20 pm

» Our 2017 garden makeover
by trolleydriver Yesterday at 11:19 pm

» Senseless Banter...
by trolleydriver Yesterday at 11:16 pm

» Feedback for my 2017 garden plan
by Scorpio Rising Yesterday at 10:15 pm

» Is this wood correct for building box?
by ralitaco Yesterday at 9:27 pm

» The raised bed of my dreams!
by ralitaco Yesterday at 9:20 pm

» Help - Building new raised beds
by ralitaco Yesterday at 9:06 pm

» Roots...information....
by ralitaco Yesterday at 8:57 pm

» Microbes...you gotta see this one !!!
by jimmy cee Yesterday at 8:20 pm

» 2017 SFG in Brooks, Ga
by yolos Yesterday at 5:41 pm

» How's the Weather Where You're At?
by bigdogrock Yesterday at 5:38 pm

» February 2017 Avatar: Time to Wake Up!
by Scorpio Rising Yesterday at 5:11 pm

» What are you eating from your garden today?
by CapeCoddess Yesterday at 4:13 pm

» Carrot Week 2017!
by countrynaturals Yesterday at 3:14 pm

» New England February 2017
by CapeCoddess Yesterday at 3:04 pm

» NOVA The Origami Revolution
by sanderson Yesterday at 1:11 pm

» -What’s Hiding in Your Organic Fertilizer
by sanderson Yesterday at 2:26 am

» Problems getting spinach seeds to sprout? Try this...
by trolleydriver 2/18/2017, 9:22 pm

» Butterfly Junction
by Scorpio Rising 2/18/2017, 3:42 pm

» Sanderson - Virtual Roadtrip Flyover
by trolleydriver 2/17/2017, 9:52 pm

» 2017 Maryland Home & Garden Show -- TIX DRAWING
by sfg4uKim 2/17/2017, 10:51 am

» broccoli stunted
by trolleydriver 2/17/2017, 8:40 am

» has55's R & D Journey;Plant Talk.
by has55 2/17/2017, 3:03 am

» Third Year SFG in Canada
by sanderson 2/17/2017, 1:48 am

» Compost source
by jimmy cee 2/16/2017, 9:28 pm

» Happy Birthday!!
by sanderson 2/16/2017, 2:06 pm

» Holy snow Batman!
by sanderson 2/16/2017, 2:00 pm

» Keeping bees
by sanderson 2/16/2017, 1:57 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!

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.

plantoid

Male Posts : 3661
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?

quiltbea

Female Posts : 4617
Join date : 2010-03-21
Age : 74
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