Using heating pads under seed flats

ronnie1aDecember 22, 2012

I have been successful in starting various seeds, in seed flats, using heating pads at 70 degrees and inside a greenhouse. My question: how long should I keep the heating pads on after the seeds germinate? The greenhouse temp, in the winter, will approach 70 in the daytime and never below 45 at night with my heater. I also have clear plastic domes over the seeds. How soon after germination should I remove those?

Thank you for reporting this comment. Undo
digdirt2(6b-7a No.Cent. AR HZ8 Sun-35)

Heat is needed only for germination and not recommended for growing on. You'll find several discussions here about this vital point.

Standard recommendation is once the seeds germinate they should be removed from the heat and provided with cooler growing temps to avoid cooking the young roots (among other things). Any covers should also be removed at the same time.

Heated soil not only risks the roots but encourages leggy growth and soil fungus problems. 45-65 or 70 is considered the ideal growing range. Cooler requires added heat, warmer requires active cooling.

Dave

    Bookmark   December 22, 2012 at 5:05PM
Sign Up to comment
More Discussions
Getting disappointed when planting zinnia from seed.
Okay, first of all, I live in a tropical country, the...
bpmontilla
Heating Mats
I am looking at purchasing a heating mat for the 2016...
weirdtrev
Problem diagnosis - Please Help!!
I am having an issue where my seedling's leaves are...
Andy Keels
Thank you All
I've been on GardenWeb forever, but I lurk mostly,...
patchworkfarm (z6 CT)
Trouble growing beets
Does anyone know why my beet seedlings will germinate...
mtgs
Sponsored Products
Bruck | Soho Down Pendant Light
$386.25 | YLighting
Elephant Patio Umbrella Table
$399.00 | FRONTGATE
Desk Lamps: 15.5 in. 1-Light Iris Desk Lamp HDY0581AN-IR
$9.88 | Home Depot
George Kovacs 27" Wide Chrome LED Chandelier
Euro Style Lighting
Aruba Blue Corded Indoor/ Outdoor 13 x 20 inch Pillows with Sunbrella Fabric (Se
Overstock.com
Tube Dark Restoration Bronze 4.75-Inch 96 Light LED Bath Lamp
$300.00 | Bellacor
Faux Dupioni Chair Wrap
Grandin Road
LADO Wall-Mount Tealight Holder by Blomus
$40.49 | Lumens
© 2015 Houzz Inc. Houzz® The new way to design your home™