Omar Khalid
Gardening with plastic sheeting is a useful method for clearing land and killing weeds. It involves cutting grass and weeds, covering the area with thick, dark plastic sheeting, weighing it down, and allowing it to suppress growth. The plastic traps heat and creates a greenhouse effect, killing plants and weeds underneath. This technique, called sheet mulching, works through light exclusion and soil polarisation. It is important to be careful not to poke holes in the plastic sheeting and to fold the ends deep underneath. This method can help gardeners deal with frustrations such as weeds and slow-growing plants.
| Characteristics | Values |
|---|---|
| Purpose | Killing weeds and grass, retaining moisture and heat in the soil, and cutting down on herbicides |
| Plastic type | Thick, dark, black plastic sheeting; light blue plastic sheeting; Photo-Degradable Embossed Black Plastic Mulch |
| Plastic thickness | 4ml |
| Plastic width | 3 feet |
| Preparation | Cut grass and weeds, then cover the area with plastic sheeting |
| Plastic application | Weigh down the plastic with bricks, large quartz stones, or soil; tuck in the edges of the plastic |
| Plastic removal | Remove plastic at the end of the growing season or after a couple of months in the sun |
| Planting | Cut holes in the plastic for plants, ensuring they are small (e.g., baseball-sized) to prevent weeds, critters, and wind |
| Plants | Tomatoes, peppers, pumpkins, squash, potatoes, melons |
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What You'll Learn
How to prepare the ground before laying plastic sheeting
Plastic sheeting can be a useful tool for gardeners, helping to prepare the ground for planting and keep weeds at bay. However, it is important to prepare the ground properly before laying plastic sheeting to ensure its effectiveness and avoid potential issues. Here is a step-by-step guide on how to prepare the ground before laying plastic sheeting:
Clear the Area
Start by clearing the area of any vegetation, including grass, shrubs, and perennial weeds. You can cut the grass short and mow the area to ensure that weeds and plants are low to the ground. Remove any visible perennial weeds by pulling them up or digging them out individually. It is important to ensure that there are no seed heads or flowers, such as dandelions, left behind, as they can regrow and defeat the purpose of laying the plastic sheeting.
Prepare the Soil
Use a rake to level the soil surface and create a smooth base for the plastic sheeting to lay flat. Remove any lumps or depressions in the soil to ensure an even surface. If you are using multiple sheets or strips of plastic sheeting, plan accordingly by measuring the area and cutting the sheeting to size, allowing for a few extra inches on each side for overlap and securing. A general guideline is to overlap each strip by at least 6 inches to prevent weed growth at the seams.
Apply a Layer of Compost (Optional)
Consider applying a 2-3" layer of organic compost or mulch on top of the cleared area. This step is optional but can help suppress weed seed germination by blocking out light. It also adds nutrients to the soil, improving its quality. However, if you plan to use clear plastic sheeting, skip this step, as the plastic will allow sunlight to pass through, promoting plant growth.
Choose the Right Plastic Sheeting
Select a colour that will suit your purpose. Black plastic sheeting is commonly used to absorb heat, making it ideal for warm-season crops. However, it can get too hot in warm climates, potentially scorching plants. Clear or light-coloured plastic sheeting allows sunlight to pass through, promoting plant growth and maintaining a more stable temperature. Choose a thickness that can withstand the elements and prevent plants from pushing through. Thicker plastic, such as 4-6 mil sheeting, is less likely to tear or degrade.
Secure the Plastic Sheeting
Once you have rolled out the plastic sheeting, secure it in place to prevent it from blowing away or shifting. Use bricks, large rocks, or concrete blocks to weigh down the corners, edges, and centre. For added security, use heavy-duty tape or a sealant designed for landscaping applications along the seams. Ensure there is no wind when installing the plastic sheeting to avoid it getting tangled or blown away.
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Choosing the right plastic sheeting
When choosing plastic sheeting for your garden, there are several factors to consider. Firstly, the thickness of the plastic is important. Thicker plastic will be more durable and long-lasting, but thinner plastic may be more flexible and easier to work with. You should also consider the colour of the plastic sheeting. Black plastic is commonly used to block light and kill weeds, but it can also absorb heat and make the soil warmer. Alternatively, white plastic can be used to reflect light and heat, which may be beneficial in warmer climates.
Another factor to consider is the type of plastic resin used. Some plastics may be treated with chemicals or additives that could potentially leach into the soil over time. It is important to choose a type of plastic that is safe for plants and will not release harmful substances. Photo-degradable plastic is a good option as it breaks down into water, carbon dioxide, and biomass, making it more environmentally friendly.
The size of the plastic sheeting is also important. You need to make sure that you have enough plastic to cover the desired area. Measure the length and width of the area you want to cover, and then choose plastic sheeting that is slightly larger to ensure full coverage. It is also important to consider the weight of the plastic sheeting. Heavier plastic will be more durable and less likely to blow away, but it may be more difficult to work with and require more people to install.
Finally, you should consider the cost of the plastic sheeting. The price of plastic sheeting can vary depending on the type, quality, and quantity. It is important to set a budget and compare prices from different suppliers to find the best value for your money. By considering these factors, you can choose the right plastic sheeting for your gardening needs and create a healthy and productive garden.
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How to lay plastic sheeting
Plastic sheeting is a great way to improve your garden by reducing weeds, retaining soil moisture, and warming the soil. Here is a step-by-step guide on how to lay plastic sheeting in your garden:
Prepare the Garden Bed:
Before laying the plastic sheeting, it is important to prepare the area. Cut down any grass and weeds as short as possible. You can also remove any visible perennial weeds by pulling them out or digging them up. Applying a layer of organic compost on top of the area is recommended.
Choose the Right Plastic Sheeting:
Select a thick, opaque plastic sheeting that is specifically designed for gardening, often called "plastic mulch." It comes in various colors, including black, clear, white, red, and yellow. Black plastic sheeting is popular as it absorbs heat, creating a greenhouse effect that kills weeds and their seeds. Clear plastic is also useful as it lets sunlight pass through for optimal soil absorption. Avoid thin plastic as it may rip easily.
Lay the Plastic Sheeting:
Start by placing sticks or tall stakes at both ends of your rows to keep them straight. If your plastic sheeting has two different sides, such as black on one side and white on the other, ensure the black side faces down to avoid overheating your seeds and plants. Roll out the plastic sheeting along the rows, maintaining a distance of about 3 feet between each row. As you work your way down the row, shovel a few inches of dirt along the edges of the plastic to hold it down and tight, preventing wind from getting underneath.
Secure the Plastic Sheeting:
Once you've reached the end of the row, make a straight cut and secure that end with stakes or a 4x4 post. Then, go back to the beginning of the row and start tucking the edges of the plastic sheeting under the soil. You can also use landscaping pins to stake down the plastic and hold it tight. Avoid poking holes in the plastic sheeting as this can create an entry point for weeds.
Planting:
To plant through the plastic sheeting, cut an X-shaped slit in the plastic where you want each plant to go. An X-shaped cut provides less room for weeds to grow compared to a circular cut. Make the hole about the size of a baseball or smaller to minimize extra space for weeds, critters, and wind. You can then plant your desired crops through the slits.
Maintenance:
Plastic sheeting can make it difficult for plants to absorb water from rainfall or sprinklers. Consider installing a soaker hose, drip system, or irrigating by hand to ensure your plants receive adequate water. Additionally, place bricks, large rocks, or concrete blocks on the edges of the plastic to weigh it down and prevent it from blowing away.
Remember to remove the plastic sheeting at the end of the growing season, especially if it is not biodegradable, to avoid leaving microplastics in the soil.
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How to cut holes in plastic sheeting for planting
Gardening with plastic sheeting is a great way to keep moisture and heat in the soil, reduce weeds, and cut down on the use of herbicides. When it comes to cutting holes in plastic sheeting for planting, there are a few important steps and considerations to keep in mind.
First, it is essential to use the right tools for cutting the plastic sheeting. The type of tool you use may depend on the thickness and type of plastic sheeting you have. For thin plastic, a gasket punch can be used to cut concentric holes. For other types of plastic, such as ABS plastic, a hole saw, step drill, or regular drill bit can be used. It is important to note that special drill bits are available for certain types of plastic, such as Plexiglas, and the use of cutting oil should be avoided to prevent cracking. If you are unsure about the type of plastic you are working with, consider consulting a professional or a local plastic shop, which may be able to cut the holes for you.
When creating holes in the plastic sheeting, it is important to cut holes that are only slightly larger than the plants or seeds you will be planting. This helps to prevent weeds from growing, critters from crawling in, and wind from causing damage. Ideally, the holes should be about the size of a baseball or smaller. It is also important to be careful not to create too many holes in the plastic sheeting, as this can defeat the purpose of using it in the first place. For example, bird droppings through holes in the plastic can introduce weeds that may compete with your plants.
Before cutting the holes, it is crucial to properly secure the plastic sheeting to the ground. This can be done by staking down one end of the row and then rolling out the plastic to the desired length. You can use landscaping stakes or old metal coat hangers cut to size. Shovel a few inches of dirt on the outside of the plastic to hold it in place and prevent wind from getting underneath. Once the plastic is secured, you can start cutting holes for your plants, making sure to keep them evenly spaced and following the recommended size.
Additionally, when gardening with plastic sheeting, it is important to consider the timing of your planting. Prepare the beds at least a week or two in advance by rolling out the plastic and filling in any necessary areas with soil to hold the plastic mulch in place. The soil should be moist to help retain moisture underneath the plastic. Transplant your plants by making holes in the plastic with a narrow garden hoe or a hori hori, placing the plants alongside each hole, and then putting the identifying plant markers in each hole.
By following these steps and considerations, you can effectively cut holes in plastic sheeting for planting, allowing your garden to thrive while also enjoying the benefits that plastic sheeting provides.
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How to remove plastic sheeting at the end of the growing season
Plastic sheeting is a useful tool for gardeners, as it can help to suppress weeds and slow-growing plants. It is also an effective way to clear land without herbicides. The sheeting is placed on the ground and weighed down with bricks, stones, or soil to trap heat and moisture, killing the vegetation underneath.
At the end of the growing season, it is important to remove the plastic sheeting to avoid it breaking down into small pieces, which can be difficult to remove. Here is a step-by-step guide on how to remove plastic sheeting:
- Prepare the area by removing any visible perennial weeds. Mow the area so that weeds and plants are low to the ground.
- Cover the area with the plastic sheeting, ensuring that it is weighed down or held in place with landscaping staples, bricks, or soil.
- Leave the plastic sheeting in place for the growing season. Keep an eye on the progress of the vegetation underneath by lifting the edge of the sheeting and checking that the plants underneath are dead or the land is bare.
- At the end of the growing season, remove the plastic sheeting. If you are using stakes, carefully lift and remove them before pulling up the sheeting.
- Dispose of the plastic sheeting appropriately and prepare the area for the next growing season.
It is important to note that plastic sheeting should not be tilled into the soil and should be removed after each season. Additionally, the use of compost or manure before placing the plastic sheeting is recommended to improve the productivity of crops.
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Frequently asked questions
Plastic sheeting can help to suppress weeds, retain moisture and heat in the soil, and reduce the need for herbicides. It can also help to speed up soil warming in spring and fall for warm-weather crops.
It is recommended to use thick, dark or black plastic sheeting that is at least 4ml thick. This type of plastic sheeting is effective at blocking light and creating a greenhouse effect underneath, which is ideal for killing weeds.
First, cut the grass and weeds in the desired area. Then, lay out the plastic sheeting and weigh it down with bricks, large quartz stones, or soil. For larger areas, you may need to use stakes to hold the plastic in place. Make sure to tuck the edges of the plastic sheeting underneath itself, similar to putting a sheet under a mattress.
Once your plastic sheeting is secured, cut holes about the size of a baseball or smaller. Place your seeds or plants into the ground through these holes. Ensure that the holes are only as big as necessary to prevent weeds, critters, and wind from getting inside.
