Do you need membrane under bark

When incorporating bark into your garden, the question arises: should one lay a membrane beneath it? This decision hinges on the specific goals and conditions of your garden.

Placing a membrane under bark can effectively suppress weed growth by acting as a barrier, preventing weeds from accessing soil nutrients and sunlight. This approach is particularly beneficial in play areas, where maintaining a clean and safe surface is paramount. AHS Ltd highlights that using a weed barrier beneath play area bark offers numerous advantages, including preventing weed growth and limiting nutrient access to weeds.

However, in planting beds, the use of a membrane may impede the natural decomposition of bark mulch, which enriches the soil over time. Additionally, membranes can restrict water and air flow to plant roots, potentially affecting plant health. Some gardeners find that membranes become a nuisance as they deteriorate, leading to maintenance challenges.

An alternative is to apply a generous layer of bark directly onto the soil, typically around 5 to 7.5 centimetres deep. This thickness can suppress weeds while allowing the mulch to decompose naturally, enhancing soil fertility. Regular replenishment of the bark layer will maintain its effectiveness and aesthetic appeal.

In summary, the decision to use a membrane under bark depends on your garden’s specific needs. For play areas, a membrane can offer practical benefits. In planting beds, foregoing the membrane may promote healthier soil and plant life.