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
» Red plastic tomato trays, anyone?
by CapeCoddess Today at 5:15 pm

» CANADIAN REGION: What are you doing in JUNE 2017
by trolleydriver Today at 4:38 pm

» TrolleyDriver's Compost Thermometer
by trolleydriver Today at 3:59 pm

» Plans for 2017 revisited
by Judy McConnell Today at 1:48 pm

» What won't you grow next year or are still trying to grow??
by countrynaturals Today at 1:13 pm

» Third Year SFG in Canada
by trolleydriver Today at 1:08 pm

» New England June 2017
by CapeCoddess Today at 12:59 pm

» It's Kefir Time
by hammock gal Today at 12:15 pm

» N & C Midwest--It is JUNE!!!! Garden Time!
by herblover Today at 11:22 am

» Does the SFG concept work for perennials?
by Judy McConnell Today at 8:30 am

» Questions on vegetable plants that require vertical support
by AtlantaMarie Today at 8:10 am

» Baby Food
by sanderson Today at 4:56 am

» Mary Mary quite contrary, how does your garlic grow?
by sanderson Today at 4:39 am

» Pepper argument who's right
by sanderson Today at 4:04 am

» What to Grow through Very Hot Summers
by countrynaturals Today at 1:24 am

» Gardening in Central Pennsylvania, 3rd year SFG
by BeetlesPerSqFt Yesterday at 9:27 pm

» Terrace Garden in Ontario, Canada
by Fiz Yesterday at 7:49 pm

» who has chickens
by llama momma Yesterday at 6:59 pm

» Watering
by GloriaG Yesterday at 2:30 pm

» Today's Harvest
by countrynaturals Yesterday at 12:22 pm

» Question About Strawberries
by AtlantaMarie Yesterday at 7:37 am

» 2017: First full year of SFGing in ND
by countrynaturals 6/24/2017, 10:15 pm

» A First Time SFG in Canada
by Kelejan 6/24/2017, 9:34 pm

» What are you eating from your garden today?
by Fiz 6/24/2017, 9:04 pm

» Love My Dust Buster
by sanderson 6/24/2017, 3:51 pm

» Butterfly Junction
by countrynaturals 6/24/2017, 3:45 pm

» 2017 corn pictures
by sanderson 6/24/2017, 3:03 pm

» Kombucha
by CapeCoddess 6/24/2017, 2:36 pm

» has55's R & D Journey
by has55 6/24/2017, 1:40 pm

» Texas Dream garden 2017
by Kelejan 6/24/2017, 12:50 am

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 : 14004
Join date : 2013-04-21
Age : 68
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 : 55
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 : 54
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

how warm is the greenhouse at night?

http://www.missouribotanicalgarden.org/gardens-gardening/your-garden/help-for-the-home-gardener/advice-tips-resources/visual-guides/tomato-fruit-problems.aspx

____________________________

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 : 54
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 : 289
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 : 55
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