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.


Display results as :


Rechercher Advanced Search

Latest topics
» CANADIAN REGION: What are you doing in March 2018
by Kelejan Today at 1:24 am

» N&C Midwest—March and Spring is Here!
by DorothyG Yesterday at 11:38 pm

» Hello from Houston
by Zuly98 Yesterday at 9:23 pm

» Fourth Year SFG in Canada
by sanderson Yesterday at 6:28 pm

» SUGA 2018
by SQWIB Yesterday at 2:53 pm

» Happy Birthday!!
by sanderson Yesterday at 2:09 pm

» Do You Get The SFG Newsletter?
by sfg4uKim Yesterday at 8:36 am

» SW Ohio (Cincinnati Area)
by AtlantaMarie Yesterday at 7:56 am

» First day of spring
by AtlantaMarie Yesterday at 7:54 am

» Coco coir... How often to replenish?
by AtlantaMarie Yesterday at 7:51 am

» Garden Tower Project
by sanderson Yesterday at 2:14 am

» Any suggestions on the stump grinding sawdust plus soil?
by sanderson 3/20/2018, 6:55 pm

» How much time for gardening?
by sanderson 3/20/2018, 6:42 pm

» Sanderson's Urban SFG in Fresno, California
by sanderson 3/20/2018, 4:03 pm

» Northern California & Coastal Valleys - What are you doing this month?
by trolleydriver 3/20/2018, 1:13 pm

» New England Mar 2018
by CapeCoddess 3/20/2018, 10:45 am

» What are you eating from your garden today?
by Scorpio Rising 3/19/2018, 6:36 pm

» Trellis mod
by SQWIB 3/19/2018, 8:39 am

» How's the Weather Where You're At?
by Scorpio Rising 3/18/2018, 6:38 pm

» Powdery Mildew and SoCal Fall Planting
by countrynaturals 3/18/2018, 12:34 pm

» Boat Gardening
by AtlantaMarie 3/18/2018, 6:51 am

» How many green beans per square foot?
by Scorpio Rising 3/17/2018, 9:27 pm

» 2018 SFG in Brooks, GA
by yolos 3/17/2018, 8:34 pm

» Comfrey
by sanderson 3/17/2018, 8:21 pm

» Hello from Hagerstown MD
by sanderson 3/17/2018, 6:10 pm

» Horsetail weed
by Kate888 3/17/2018, 3:02 pm

» A new SFG fan from Texas
by AtlantaMarie 3/17/2018, 7:17 am

» Potatoes: Yes or No?
by AtlantaMarie 3/17/2018, 7:13 am

» Modesto, Central Valley, CA...
by AtlantaMarie 3/17/2018, 7:03 am

» has55's R & D Journey
by sanderson 3/16/2018, 3:28 pm


Search SFG Forum

Three Sisters... my new word: "allelopathy"

Go down

Three Sisters... my new word: "allelopathy"

Post  Windmere on 7/24/2014, 3:14 pm

Yesterday I read a good article in the Aug/Sep issue of Organic Gardening.  The article focused on the "Three Sisters" method of gardening and it mentioned some new stuff I had never heard before.  Here goes:

"Most gardeners have heard of 'three sisters,' three food plants traditionally grown together by native Americans, and supposed reasons why the crop combination works:  The corn acts as a pole for climbing beans, the beans fix nitrogen, thereby providing an important plant nutrient; and the squash's broad leaves shade out the weeds."

Moving on, "As it turns out, squash plants do suppress weeds, but in addition to blocking the sun with their large leaves, they also take on the weeds through and altogether more sophisticated mechanism:  allelopathy.

"Allelopathy is 'chemical warfare between plants,' says Stephen Duke, Ph.D., research leader a the USDA's Natural Products Utilization Research Unit.  Allelopathy occurs when plants produce natural chemicals, known as allelochemicals, that inhibit growth of competing species."

Some more points I got from reading the entire article:

The phenomenon of allelopathy was not understood until about a century ago.  Duke explained that "juglone" found in black walnut is very toxic to other plants (I've heard about this before).

"Squash can inhibit surrounding weed growth through their roots and through leaf litter that has fallen to the ground or from dead, decaying plants.  The chemicals inhibit weeds more than they impact crop plants."

A sad point is that most plants have had allelopathy bred out of them to increase yield.  As a result, Duke says, "Weeds tend to be more allelopathic than crops [because] we haven't tinkered with them."

Types of crops that can be allelopathic are a certain kind of rice, "beets, corn, wheat, oats, peas, buckwheat, millet, barley, rye and cucumber.  Additionally, several species of sage have been shown to inhibit cucumbers and oats; sunflowers impact wheat; and wormwood suppresses beans, fennel and peas.".

Mulches made from allelopathic plants can help retard weed growth.  The allelochemiclas they release break down quickly, so they won't harm the next crop you plant in that space.  Make sure that, when applying allelopathic mulches to crops, the crop plant is well established before applying the mulch.

I have heard about other crop combinations that can be good or bad (I can't think of any specific ones right now though).

The last sentence in this articles says, "Imagine a day when 'applying herbicide' means spraying and aqueous mixture of a strongly allelopathic plant!"

I just wanted to share that with everyone.  The article is entitled "Weed Whacked" and it was written by Jill Richardson.

Male Posts : 1425
Join date : 2013-02-26
Age : 49
Location : Fayetteville, GA - Zone 7B - 8A

View user profile

Back to top Go down

Re: Three Sisters... my new word: "allelopathy"

Post  mollyhespra on 8/3/2014, 10:10 pm

I don't know how I missed this before. Great article, Windmere, thanks for posting about it!

Female Posts : 807
Join date : 2012-09-21
Age : 52
Location : Waaaay upstate, NH (zone 4)

View user profile

Back to top Go down

Fascinating stuff

Post  Windmere on 8/4/2014, 10:40 am

Thank you for the comment mollyhespra.  These types of scientific facts are fascinating to me.  Who would have thunk?

Male Posts : 1425
Join date : 2013-02-26
Age : 49
Location : Fayetteville, GA - Zone 7B - 8A

View user profile

Back to top Go down

Re: Three Sisters... my new word: "allelopathy"

Post  GWN on 8/4/2014, 6:00 pm

that was very interesting. would like to read more about it
thank you

Posts : 2804
Join date : 2012-01-14
Age : 61
Location : british columbia zone 5a

View user profile

Back to top Go down

Re: Three Sisters... my new word: "allelopathy"

Post  Sponsored content

Sponsored content

Back to top Go down

Back to top

Permissions in this forum:
You cannot reply to topics in this forum