Gravel Bed Installed at ACD

 Gravel beds are designed to store bare-root trees and shrubs while enhancing root development. Gravel beds can be crafted from anything that can contain 18-inches of pea gravel, or can even be made from nothing more then piles of pea gravel.

Plants placed in gravel beds become stressed and put energy into creating fine root systems to find nutrients and water. After a few months, the well-developed root systems increase survival rates after planting by several fold. Gravel allows for root growth while making the plants easy to remove. Gravel also doesn't degrade and inhibits the growth of pathogens and weeds.

Bare-root trees and shrubs are easier to handle, cheaper to purchase, and come in greater varieties. Since bare-root plants are often only available in the early spring, the gravel bed can store bare-root plants for projects that have a summer or fall timeline. Plants with healthier root systems and higher survival rates are particularly important on projects where watering newly planted trees and shrubs is impractical.

ACD's gravel bed was envisioned and designed by Ethan Cypull, a Minnesota GreenCorps member that is currently stationed at ACD. Construction of the gravel bed was completed by Ethan and other ACD staff.

For more information contact Ethan Cypull, This email address is being protected from spambots. You need JavaScript enabled to view it., 763.434.2030 x120 

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Sheet Mulching

Sheet mulching – saves time, builds soil, and smothers existing weeds or lawn without using herbicide.

Sheet mulching is an excellent way to convert lawn to garden beds without using herbicides or excessive labor. Meanwhile it can build soil and be accomplished with readily available materials.

Begin by mowing grass or other vegetation in the area you want to convert into a new garden bed. It can be as simple as layers of newspaper or cardboard topped by four inches of mulch to smother grass and weeds underneath. If this is started in the spring, the underlying plants will have died from lack of light and the garden bed will be ready for planting in the fall.A more diverse layering of material will produce a compost that will break down and build your soil. For this, layer:

  1. Soil amendments if soil test results recommend amendments (lime, greensand, etc.). Recommended if you are creating a vegetable garden.
  2. Thin layer of compost.
  3. Wet newspaper or cardboard, 1/4 – 1/2 inch thick.
  4. Thin layer of nitrogen source such as manure.
  5. Layer of straw or leaves (carbon source).
  6. Continue to alternate layers of nitrogen and carbon sources.
  7. End with a top layer of mulch.

This type of bed is finished when these layers have decomposed. It may take the entire growing season to decompose sufficiently. If you start in the spring, the bed will likely be ready to plant in the fall.

See the Xerces Society Organic Site Preparation for Wildflower Establishment publication for more organic site preparation methods and directions:

https://xerces.org/publications/guidelines/organic-site-preparation-for-wildflower-establishment

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