6 Ways to Get Rid of Grass in Block Paving

Why Does Grass Grow in Block Paving?

Grass sprouting between the crevices of block paving is a common occurrence, influenced by a combination of natural and environmental factors:

• Seed Dispersion: Seeds are the primary initiators of grass growth. They can land on the paving through wind, bird droppings, or water runoff.
• Gaps and Joints: Over time, the filler material between blocks, often sand, can erode. This creates spaces where seeds can settle, germinate, and grow.
• Organic Accumulation: Fallen leaves, dust, and other organic debris can accumulate between the blocks. This organic matter, combined with moisture, creates a conducive environment for seed germination.

You’ll need to make sure that you pull the weed or grass out from its root as opposed to just the green parts above the surface. While this does take longer, the results will last longer so it’s worth it. We would suggest wearing protective gloves and using a knee pad to protect your joints while you’re on the ground. It’s also worth thinking about when you’ll remove the weeds as doing so just after heavy rain will make it easier. If it’s the height of summer and rainfall doesn’t look imminent then you could try wetting the area with a hose prior to weeding.

Tips:

• Use a gardening knee pad to make the process more comfortable.
• Invest in a good pair of gardening gloves to protect your hands.
• For stubborn grass or weeds, consider using a weeding tool or knife to help lift the roots.

It’s a good idea to first remove any long grass or weeds from the area and then jet-wash the gaps to remove any seeds that may result in more weeds. You should also be aware that power washing too frequently could wash away the sand between the blocks which will affect the stability of the structure. Jet washers (Amazon link – opens in a new tab) are really handy and every home should have one. They can be used for a variety of things so you would definitely make use of it.

Tips:

• Ensure you wear protective clothing and goggles to avoid any debris.
• Start from one end and work your way systematically to ensure even cleaning.
• Avoid using the highest pressure setting as it can damage the paving.

You may need to apply more than one kettle full of water depending on the size of the area and you must make sure that the grass and weeds are thoroughly doused.

Tips:

• Pour the boiling water slowly to target the grass and weeds effectively.
• Be cautious of any nearby plants or flowers; boiling water can damage them.
• Reapply boiling water after a few days if you notice any regrowth.

It’ll start working as soon as you apply it, and you’ll watch the grass and weeds begin to dry out before your very eyes! White vinegar works best on younger plants but there are higher-concentration products out there designed specifically for use on older weeds, plants, and grasses.

Tips:

• Opt for distilled white vinegar for best results.
• For a more potent solution, consider adding a teaspoon of dish soap to help the vinegar stick.
• Apply during a sunny day to speed up the drying process and enhance the vinegar’s effectiveness.

This won’t kill the grass or weeds on the spot but as they begin to die, you can then add some additional salt to finish the job. To make sure that the problem doesn’t reoccur, you should spray affected areas with your saltwater solution around once a month. If the solution doesn’t kill the grass and weeds, you can increase the amount of salt you put in.

Tips:

• Ensure you mix the salt thoroughly until it’s completely dissolved.
• Be cautious when applying near plants; salt can dehydrate and kill them.
• For areas with dense grass, consider increasing the salt concentration.

You’ll need quite a bit of baking soda depending on the size of the area and you’ll pour this onto the surface and sweep it into the gaps. However, the problem with this method is that it typically only works well during mild weather such as in spring and autumn. Moreover, you will need to repeat the application round every three weeks to prevent future problems.

Tips:

• Sprinkle baking soda during dry weather to ensure it stays in place.
• After application, lightly water the area to activate the baking soda.
• Reapply every few weeks or after heavy rainfall.

How to Repair Block Paving After Removing Grass?

Removing grass and weeds from block paving can sometimes lead to minor damages or expose pre-existing issues. Here’s how to address and repair such damages:

• Refill the Gaps: After removing grass, you might notice gaps or spaces between the blocks. Refill these gaps using a suitable jointing compound or kiln-dried sand. This not only stabilizes the blocks but also prevents future weed growth.
• Replace Damaged Blocks: If you find any blocks that are cracked, chipped, or broken during the grass removal process, it’s best to replace them. Carefully remove the damaged block using a chisel and mallet, and then place a new block in its position. Ensure it’s level with the surrounding blocks.
• Clean the Area: Once the grass is removed, there might be residual dirt or organic matter. Use a stiff brush to sweep the area clean. For stubborn stains or residues, consider using a mild detergent or a specialized paving cleaner.
• Seal the Paving: To protect the paving and prevent future grass or weed growth, consider applying a sealant. Sealants create a barrier on the surface, making it harder for seeds to germinate and grow.