Use stone meal against weeds

What is rock flour?

Many hobby gardeners know Primary rock meal as a valuable fertilizer that adds mineral trace elements to the soil and as a natural aid in the fight against vermin and fungi. The starting product for rock flour can be:

• basalt
• lava
• quartz
• Zeolite
• Diabase
• Granite.

Sometimes clay flour is also ground into primary rock flour.

The ingredients of the product depend on the original rock. However, they always contain high levels of trace minerals.

Why do rock flour in the joints act as weed-inhibiting?

By Rock flour(€ 12.33 at Amazon *) can you Getting weeds out of the paving stone joints permanently. That works because:

• The minerals lower the pH of the soil, so weed seeds find suboptimal conditions.
• The fine grain penetrates even the smallest cracks and completely fills cavities.
• The subsoil is compacted so much that the weed roots can barely spread.

Nevertheless, the joints remain permeable to water. Rainwater drains well and puddles do not form, provided the surface is level.

How is rock flour properly applied?

Remove with the Grout scraper all weeds and deposited substrate about three centimeters deep. Then proceed as follows:

• Let the grout dry completely before using this Rock flour backfill.
• Scatter the material directly into the cracks.
• Sweep back and forth across the surface to work in and compact the rock flour.
• You can borrow surface vibrators from many hardware stores. These make work noticeably easier, especially in large areas such as the courtyard entrance.

Carefully sweep up any excess rock flour. If the joints are completely compacted after a few weeks due to rain and loads, you can fill small depressions with the dry material.