Tuesday, July 5, 2022

Gardening Joy and Challenges: The Good and the Invasive Weeds

 


Removing weeds is the most disliked gardening chore by almost all gardeners.  However, there
are "good" weeds such as Goldenrod (Solidago species) and Joe Pye Weed (Eutrochium purpureum) which are native species that support pollinating insects and birds and contribute to the ecosystem.  Another beneficial weed is clover.  As a legume crop, it fixes nitrogen in the soil and nourishes surrounding plants.  Instead of ripping it out, hark clover underneath the soil. 

Other weeds can be aggressive and choke out expensive garden plants. Some produce biochemical(s) that influence the germination of seeds and hamper the growth, survival, and reproduction of other plant species.

Weed which you definitely want to avoid:

Bindweed has lovely flowers, but it is not welcome in the garden because of its aggressive growth and its ability to resist containment because of its extensive root system.  Some reports have said that the roots can grow as deep as 6-30 feet and have seeds that can germinate decades (more than 20 years) later.  It twines and climbs up amongst garden plants and competes for sunlight, moisture, and nutrients.  If even the smallest piece of root is left remaining in the soil, a new plant will form.


Dandelions are considered weeds and grow over-abundant. However, they are pretty and considered super-food: their leaves are a great addition to salads, their roots can be grilled, and the flowers can be prepared as a fruit wine or infuse vinegar or oils.

Invasive Weeds That Need to go:

  • Dog-Strangling Vine
  • Bindweed
  • Plantains
  • Thistle
  • Purslane
  • Garlic mustard 
  • Buckthorn tree/shrub
  • Japanese Knotweed shrub
  • Poison Ivy

Important: Don't pull the weeds, dig them out to get all roots, otherwise they will grow back.  And please always wear gloves!  Weeds between stepping stones can be erased by pouring boiling water or a mixture of vinegar, salt, and boiling water over them.  Choose a hot and dry day and repeat the procedure after a couple of days.

How to Prevent Weeds

Weeds are growing mostly on disturbed soils.  Start with adding compost and rake it into the soil. Then add at least eight inches of natural cedar mulch.  Weeds are prevented by mulch, and even if one or the other grows over the years, they are very easy to yank out.  An additional benefit of mulching is that moisture is kept in the soil and temperature differences in summer or winter are evened out. 

Read more:

https://www.oneearth.org/the-various-advantages-of-clover/

https://www.thespruce.com/controlling-and-preventing-bindweed-2540090

https://www.gardeningknowhow.com/edible/herbs/dandelion/uses-for-dandelions.htm


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