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
» How's the Weather Where You're At?
by Kelejan Today at 7:53 am

» Sweet Potatoes
by AtlantaMarie Today at 6:34 am

» New England December 2017
by AtlantaMarie Today at 6:32 am

» California's Drought
by AtlantaMarie Today at 6:29 am

» Happy Birthday!!
by AtlantaMarie Today at 6:23 am

» Garden Clean-Up/Preparation
by meatburner Today at 1:09 am

» 1st Seed Catalog Arrived :)
by Scorpio Rising Yesterday at 7:43 pm

» jalapeno variety question?
by brianj555 Yesterday at 6:03 pm

» Sauerkraut & fermenting veggies
by brianj555 Yesterday at 5:28 pm

» Areogardening
by sanderson Yesterday at 3:22 pm

» Tomato Questions
by sanderson Yesterday at 3:04 pm

» Mid-South: December 2017
by AtlantaMarie Yesterday at 8:24 am

» What's Up? Yukon gold potatoes!
by sanderson Yesterday at 3:15 am

» CarbSmart (tm) Potatoes
by countrynaturals Yesterday at 3:09 am

» New Composter - Need Help Filling Correctly
by saganco 12/12/2017, 9:10 pm

» Third Year SFG in Canada
by countrynaturals 12/12/2017, 5:08 pm

» Butterfly Junction
by countrynaturals 12/12/2017, 5:02 pm

» December Avatar: 'Tis The Season!
by sanderson 12/12/2017, 2:29 pm

» The Research Journey:cardboard covering of newly planted seeds
by saganco 12/12/2017, 1:15 pm

» 2017 SFG in Brooks, Ga
by Turan 12/11/2017, 6:39 pm

» What are you eating from your garden today?
by sanderson 12/11/2017, 2:40 pm

» Winter Sowing vs. Winter Growing
by countrynaturals 12/11/2017, 11:44 am

» Mushroom in my lettuce!
by Scorpio Rising 12/10/2017, 10:40 pm

» 5-BOOK BUNDLE GIVEAWAY - ENDS 12/1/17
by No_Such_Reality 12/10/2017, 4:15 pm

» N&C MW; Deep Winter December/January 2017-2018
by Scorpio Rising 12/10/2017, 1:36 pm

» December: What to plant in Northern California and Central Valley areas
by countrynaturals 12/10/2017, 1:24 pm

» Spring Fever Anyone?
by brianj555 12/10/2017, 12:50 pm

» WARNING! Please Read! (Especially Grandparents)
by Scorpio Rising 12/9/2017, 8:53 pm

» The start of the New Garden
by brianj555 12/9/2017, 1:35 pm

» Holy snow Batman!
by countrynaturals 12/8/2017, 6:26 pm

Google

Search SFG Forum

Cause of poor tomato blossom pollination?

View previous topic View next topic Go down

Cause of poor tomato blossom pollination?

Post  boffer on 8/11/2014, 4:58 pm

This is the second year I've observed this: the indeterminate tomatoes in my greenhouse produce very  well on the lowest 3 feet, but little or nothing above that.  Currently the plants are 6-7 feet tall.

I had blossoms on the top 3-4 feet, but they didn't get pollinated.  Three things I've thought of:

1. About the time the higher blossoms are showing up, I put shade cloth on the greenhouse to keep the heat down.  The shade cloth was second-hand, so I don't know the amount of light transmission.  Is it possible the plants aren't receiving enough direct sunlight, even though they are warm enough?

2. The temps in the greenhouse haven't been above 90°.  Is that still too hot for them?

3. I have a circulation fan blowing  horizontally 24/7 at a little over 6 feet high.  Could that interfere with pollination on the higher blossoms?

It's too late for this year, but I need to try something different next year.  Ideas?
avatar
boffer

Male Posts : 7392
Join date : 2010-02-26
Age : 64
Location : yelm, wa, usa

View user profile http://boffer.us/

Back to top Go down

Re: Cause of poor tomato blossom pollination?

Post  sanderson on 8/11/2014, 6:55 pm

Boffer, YOU are asking for OUR input?  Shocked  This has been a dismal tomato year for me. But, next year! There's always next year.

1. Don't know
2. 90* may be too hot for your tomatoes. Here, now that the temps are down in the 90's, I finally have 2 little tomatoes on a volunteer. I assume the ones you have outside are doing fine.
3. Does the fan dry out the blossoms more than they help with pollination. ? Tapping them early in the day before the fans are needed may actually be better.
avatar
sanderson

Forum Moderator Certified SFG Teacher

Female Posts : 15073
Join date : 2013-04-21
Age : 69
Location : Fresno CA Zone 8-9

View user profile

Back to top Go down

Re: Cause of poor tomato blossom pollination?

Post  Marc Iverson on 8/11/2014, 9:11 pm

I've read about tomato blossoms refusing to set at various temps ranging from 85 to 95 degrees, so 90 does fit in there.

Also read that early producers tend to have that problem more than late producers -- more sensitivity to heat. Dunno how reliable that is, can't remember the source, but I didn't discount it out of hand either.

Could hot air rising have anything to do with it? The blossoms at the bottom may be better shaded, and cooler. Some of my beefsteak tomatoes have only been setting fruit at the bottom, where heavily shaded from the sun by a cooling canopy of leaves. The ones on top are just drying up and falling off. It's only as our days have dropped from consistent 100+ temps that I'm getting a few tomatoes even a foot from the soil. The previous sets were only inches from the ground.
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: Cause of poor tomato blossom pollination?

Post  camprn on 8/11/2014, 9:17 pm

I'm having a similar problem with the newer fruit on my indeterminate tomatoes. In my case I am getting pollination but the fruit is slow to grow. I am chalking to up to the plant putting energy into the nearly mature fruit and I'm hoping the younger fruits will begin to grow once I begin harvesting.

____________________________

41 years a gardener and going strong with SFG.
http://squarefoot.creatingforum.com/t3574-the-end-of-july-7-weeks-until-frost

There are certain pursuits which, if not wholly poetic and true, do at least suggest a nobler and finer relation to nature than we know. The keeping of bees, for instance. ~ Henry David Thoreau

http://squarefoot.creatingforum.com/t1306-other-gardening-books



avatar
camprn

Forum Moderator Certified SFG Teacher

Female Posts : 14165
Join date : 2010-03-06
Age : 55
Location : Keene, NH, USA ~ Zone 5a

View user profile http://squarefoot.creatingforum.com/t3574-the-end-of-july-7-week

Back to top Go down

Re: Cause of poor tomato blossom pollination?

Post  camprn on 8/12/2014, 8:15 am


____________________________

41 years a gardener and going strong with SFG.
http://squarefoot.creatingforum.com/t3574-the-end-of-july-7-weeks-until-frost

There are certain pursuits which, if not wholly poetic and true, do at least suggest a nobler and finer relation to nature than we know. The keeping of bees, for instance. ~ Henry David Thoreau

http://squarefoot.creatingforum.com/t1306-other-gardening-books



avatar
camprn

Forum Moderator Certified SFG Teacher

Female Posts : 14165
Join date : 2010-03-06
Age : 55
Location : Keene, NH, USA ~ Zone 5a

View user profile http://squarefoot.creatingforum.com/t3574-the-end-of-july-7-week

Back to top Go down

Re: Cause of poor tomato blossom pollination?

Post  Yardslave on 8/13/2014, 1:12 pm

Early on in the season, my tomatoes weren't setting fruit because it go too chilly for them at night. Their growth rate was OK, but the blossoms weren't setting. I resorted to misting the blossoms lightly with apple juice, and lightly tapping the clusters with a pencil. The apple juice emits ethylene oxide which promotes fruit setting and ripening, and the tapping dislodges pollen. Works for my tomatoes!
avatar
Yardslave

Male Posts : 308
Join date : 2012-01-19
Age : 66
Location : Carmel Valley, Ca.

View user profile

Back to top Go down

Re: Cause of poor tomato blossom pollination?

Post  boffer on 8/13/2014, 7:01 pm

I hadn't heard about the apple juice trick.  Interesting.

The lower fruits would have been the ones experiencing cool night time temps, and they did OK with just my tapping the blossoms.  Our nights this year seem to be warmer than usual, around 60°.

Camp's link said that tomatoes need 6 hours of direct sunlight daily, but that's a rather vague requirement.  6 hours of Texas sun is a lot different than 6 hours of PNW sun.
avatar
boffer

Male Posts : 7392
Join date : 2010-02-26
Age : 64
Location : yelm, wa, usa

View user profile http://boffer.us/

Back to top Go down

Re: Cause of poor tomato blossom pollination?

Post  Marc Iverson on 8/13/2014, 11:43 pm

I'd hate to be in Texas sun, then. We were over 100 like clockwork in July, but we tend to only get a little over a month of that here, thank goodness.
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: Cause of poor tomato blossom pollination?

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