Germination in high temps

Keiththibodeaux · May 16, 2012

At what high temperature does germination tend to drop off.

cedarswamp · May 17, 2012

I sprout tomatoes and peppers year round as I grow indoors under lights and I've never encountered any drop off in germination rate that I've noticed, even in the August heat.

amideutch · May 18, 2012

When the temps hit the 90's is when I notice it. Ami

Keiththibodeaux · May 19, 2012

Quote:

Originally Posted by amideutch

When the temps hit the 90's is when I notice it. Ami

Thanks, we have been the 90s for the last couple of weeks and some things I am germinating have gotten very slow. I was wondering if I would be better off to move my propagators inside where the highs stay in the mid 70's, and to move them out after germination.

amideutch · May 20, 2012

Keith, I was thinking pollination versus germination.

Ami

greenthumbomaha · July 16, 2012

It's been in the upper 90's to 100 every day relentlessly the past month. I've had mixed success starting my fall garden transplants, mostly broccoli and cabbage, in this blazing heat. I finally resorted to taking the trays inside and outside during the evening. Everything finally germinated after a months worth of attempts, but now that they're outside , they aren't growing nearly as fast as they would inside under lights at a normal temperature.

greenthumbomaha · July 18, 2012

I've started some additional transplants using the dreaded coir pellets, and success!, they have all germinated within two days outdoors in temps 80-100. Peat based seed starting mixes and the Jiffy pellets did not germinate well under the extreme heat. Highly recommend trying both mediums as a test to anyone starting their fall gardens. I wasted tons of seeds last month on the peat. We shall see how they do as plants.

b54red · August 7, 2012

My biggest problem hasn't been germination in my greenhouse but damping off. We have been having rain almost every day for the past week and the humidity and lack of light has created the perfect conditions for damping off. My first plantings of all my fall crops died from it so I am trying again and it is still raining. No way to keep the soil surface dry so I am trying something the seed planter at a local nursery told me about. I am sprinkling Captan lightly over the soil after starting the seed. Hope it works as I have hundreds of seeds started. I have tried many seed starting mediums but have not found one yet that is immune to these conditions for damping off. I even used one called No Damp Off and the results were if anything worse. I am going to order some of that coconut coir and try that this winter when starting my tomatoes and peppers. Does anyone have a suggestion for a good source for coconut coir online as it is unavailable around here?

May 16, 2012	#1
Keiththibodeaux Tomatovillian™ Join Date: Jun 2011 Location: Louisiana Posts: 587	Germination in high temps At what high temperature does germination tend to drop off.

May 18, 2012	#3
amideutch Tomatovillian™ Join Date: Feb 2006 Location: Germany 49°26"N 07°36"E Posts: 5,041	When the temps hit the 90's is when I notice it. Ami __________________ Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘...Holy Crap .....What a ride!'

May 20, 2012	#5
amideutch Tomatovillian™ Join Date: Feb 2006 Location: Germany 49°26"N 07°36"E Posts: 5,041	Keith, I was thinking pollination versus germination.Ami __________________ Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘...Holy Crap .....What a ride!'

May 17, 2012	#2
cedarswamp Tomatovillian™ Join Date: Jul 2011 Location: New Jersey 7a Posts: 19	I sprout tomatoes and peppers year round as I grow indoors under lights and I've never encountered any drop off in germination rate that I've noticed, even in the August heat.

July 16, 2012	#6
greenthumbomaha Tomatovillian™ Join Date: Nov 2011 Location: Omaha Zone 5 Posts: 2,514	It's been in the upper 90's to 100 every day relentlessly the past month. I've had mixed success starting my fall garden transplants, mostly broccoli and cabbage, in this blazing heat. I finally resorted to taking the trays inside and outside during the evening. Everything finally germinated after a months worth of attempts, but now that they're outside , they aren't growing nearly as fast as they would inside under lights at a normal temperature.

July 18, 2012	#7
greenthumbomaha Tomatovillian™ Join Date: Nov 2011 Location: Omaha Zone 5 Posts: 2,514	I've started some additional transplants using the dreaded coir pellets, and success!, they have all germinated within two days outdoors in temps 80-100. Peat based seed starting mixes and the Jiffy pellets did not germinate well under the extreme heat. Highly recommend trying both mediums as a test to anyone starting their fall gardens. I wasted tons of seeds last month on the peat. We shall see how they do as plants.

August 7, 2012	#8
b54red Tomatovillian™ Join Date: Sep 2009 Location: Alabama Posts: 7,068	My biggest problem hasn't been germination in my greenhouse but damping off. We have been having rain almost every day for the past week and the humidity and lack of light has created the perfect conditions for damping off. My first plantings of all my fall crops died from it so I am trying again and it is still raining. No way to keep the soil surface dry so I am trying something the seed planter at a local nursery told me about. I am sprinkling Captan lightly over the soil after starting the seed. Hope it works as I have hundreds of seeds started. I have tried many seed starting mediums but have not found one yet that is immune to these conditions for damping off. I even used one called No Damp Off and the results were if anything worse. I am going to order some of that coconut coir and try that this winter when starting my tomatoes and peppers. Does anyone have a suggestion for a good source for coconut coir online as it is unavailable around here?