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bamboo and sunflowers: are the allelopathic properties toxic in a compost?

 
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I am looking at the plants I have a lot of in my garden space that i have not used much in the past because I have heard they are  allelopathic to other plants (at least some plants). So I wonder if I can use bamboo leaves and the large stalks of the sunflower in composting or sheet mulching? I have lots of bamboo hedges and many sunflowers piled up in a space by themselves which I have pulled up. I am thinking of chopping them up for new beds for sheet mulch, along with grass, leaves and straw.  I also want to grow more biomass plants in this space (this is my third year at current site). I have other herbs that I use as biomass: yarrow, comfrey, mints etc. Any other ideas I can grow for biomass at texas (where I can grow in winter as well) would be appreciated.
sophia
 
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I hope someone with more experience will report on your question.

It is my understanding that those properties will break down in the compost, especially if the compost gets really hot.

Here is something I was able to find doing a search:

Ben said, "was done on composted evergreen forest products, which means a lot of redwood. The main thing those tannins need to break down is time, and in return they lose less N and C to off-gassing (Noss, 1998).



https://permies.com/t/40/6970/Myth-Allelopathic-Wood-Chips-wood

 
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I have always chopped up and composted sunflower leaves and stalks. Never had a problem.
 
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i also chip up the sunflowers and use them as mulch, never a problem either.
 
sophia compton
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Good to know.
I have observed that some plants are not bothered by my many sunflowers but some things dont do well under them, which I grow for partial shade. So I am glad to know I can compost them. I read an article that said that the most obvious place where sunflower toxicity is visible is under bird feeders and I have noticed that my plants all died in an area where I had a bird feeder with sunflowers with hulls. So I am glad to know I can compost them. Not sure about the bamboo. More research needed for that.  I also have castor bean which is a beautiful plant but so toxic that I did read once that it should not be composted. I am more interested in sheet composting, which wont get hot, so i will probably put the stalks thru a wood chipper and throw them in the new bed i am making for spring. I imagine I can use most anything green for a nitrogen source, right? I have a lot of arugula and mustard that I planted as a fast-growing cover crop in between my summer and fall garden.

Anne, I have heard that cedar is not toxic as some believe and i wish i could get any kind of wood chips. I live in a town of 2000 and i think free wood chips are more available in suburban areas.
I like your quotes by Stephen Buhner btw.  I learned a lot from his books, and wrote an herb book myself many years ago.
sophia
 
Tereza Okava
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Sophia, I wouldn't worry too much about the castor bean either. Here it's a native weed, grows everywhere, prefers poor soil where nothing else grows but when it's in good dirt it grows alongside other plants. The seeds are toxic but the rest is no big deal and we chip it up too for mulch.
 
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