Plants That Can be Grown Around Walnuts and Hickories - Juglone Tolerant Plants

Plants Tolerant to Juglone


Walnuts and hickories produce the chemical juglone, which is exuded from all parts of the plant. This chemical can inhibit the growth rate of nearby plants, a phenomenon known as negative alleopathy.

 
The following lists of plants tolerant to juglone were compiled from published sources. They are based on observation under various settings, but few plants have been experimentally tested for sensitivity to juglone. The plants highlighted in green are species I have personally observed growing seemingly unhindered in and around the under story of Juglans regia.

Walnuts from our Gardens  
Many factors affect sensitivity, including level of contact, health of the plant, soil environment, and the overall site conditions. Aside from juglone, a mature walnut will cast a very heavy shade and young sun demanding plants will not survive in these conditions. The lists provided here are strictly guides and cannot be considered complete or definitive.

20 yr old Walnut in our Garden  with Sambucus nigra, Aronia melanocarpa and Pyrus cv. doing very well 


If you have experience of plants growing well under and around a Juglone producing plant that are not on this list, please share in the comments section below.

View our previous post for The Essential Guide to Everything you Need to Know about Walnuts!.






Bulgarian Walnut Cultivars - Hardy and Resistant to Major Pest and Diseases 


Below you can find profiles of some Bulgarian cultivars that we have on offer at our Bio-nursery. These cultivars  are high yielding and resistant to common walnut diseases. 

We are currently offering these cultivars at ​​ €22 per tree with 10% discount for orders over 10 trees. Delivery all other Europe

For other disease resistant walnut cultivars see Agroforestry Research Trust.

Walnut cultivars for Permaculture and Forest Gardens 


Cultivar - 'Izvor 10'

  • Fruiting - The fruit forms on lateral buds and ripen around mid September. Excellent tasting oblong nuts with a thin shell. The nuts weigh around 10 g have a high fat content - 55.7%.
  • Disease Resistance - Excellent resistance to Walnut anthracnose and Walnut blight
  • Form - The tree forms a broad, relatively thin crown
  • Hardiness - A very hardy cultivar tolerating temperatures down to -25 - 30 ºС
  • Flowering Period - Late

Cultivar - 'Sheinovo'

  • Fruiting - The fruit forms on the tips and ripen around mid September. Excellent tasting nuts that are easy to remove from the thin shell. The nuts weigh around 12 -13 g and have a high fat content - 71.4% . 
  • Disease Resistance - Good resistance to Walnut anthracnose and Walnut blight 
  • Form - The tree is vigorous with a wide spread crown 
  • Hardiness - A hardy cultivar tolerating temperatures down to -24 ºС 
  • Flowering Period - Mid - Late

Cultivar - 'Dryanovo'


  • Fruiting - Fruits for on the tips of branches and ripen to very large 14 - 18 g round nuts. The fat content is 67.39%. 
  • Disease Resistance - Very resistant to anthracnose, though very susceptible to blight. 
  • Form - The tree is vigorous with dome shaped crown 
  • Hardiness - A hardy cultivar tolerating temperatures down to -24 ºС 
  • Flowering Period - Mid - Late

To order some walnut cultivars for delivery this winter contact us at balkanecologyproject@gmail.com

   
If you would like to create a forest garden and gain some practical hands on experience join us this Summer. We'll be covering site surveying, landscape design software, installing access, beds, irrigation channels, planting tree, shrub, herb and ground layers and making a small wildlife pond. All in 3 days! And plenty of follow up material to take away with you to digest slowly.


Registration for our June course is now open with 15% discount on accommodation and food fees when you register as a group (2 or more).



We offer a diversity of plants and seeds for permaculture and forest gardens  including a range of fruit and nut cultivars. We Deliver all over Europe from Nov - March. Give a happy plant a happy home :) 


The Bionursery


http://www.thepolycultureproject.com/store/c2/Grow_your_Own_Polyculture_.html



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 References 

  • http://extension.psu.edu/plants/gardening/fact-sheets/trees-shrubs/landscaping-and-gardening-around-walnuts-and-other-juglone-producing-plants




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