A polyhouse protects crops from rain and insects, but the floor is often left as bare soil. Weeds sprout between rows within weeks, and puddles form after every irrigation cycle. A weed mat solves these floor problems in one go when you choose the right weight, plan the layout before you cut and prepare the ground for drainage. In our experience, growers who get these three steps right spend far less time on floor upkeep in later seasons.

Why does a polyhouse floor need a weed mat cover?

Weeds inside a protected structure cause more damage than they do in an open field. They compete with crops for water and nutrients, and they give pests a place to hide and breed.

Did you know? Purdue University Extension warns that weeds growing inside and just outside a greenhouse can harbour diseases and insects. Its sanitation guide advises covering soil floors to keep soilborne pests away from pots.

A woven ground cover mat blocks sunlight from reaching the soil, so weed seeds cannot grow. Water still passes through the fabric. The floor stays cleaner, walkways stay firm and spraying for weeds becomes unnecessary. That makes woven fabric a practical ground cover for weed control in any structure where crops grow in beds, bags or pots.

Which GSM weed mat should you choose?

GSM stands for grams per square metre. A higher GSM means a denser, heavier fabric that handles more wear. Greenpro Ventures offers three options: 90, 100 and 130 GSM. Crop type, traffic and how long you plan to keep the floor all affect the final choice, so confirm the right GSM with our team before you order.

How should you plan the floor layout?

Start with accurate measurements of each bay, including walkways, bed widths and any drain channels. Our mats come in widths of up to 5.25 m in a single piece, which covers most polyhouse bays without a join. Fewer joins mean fewer gaps for weeds to push through.

Colour plays a part too. Black fabric gives the strongest weed suppression. White fabric reflects light back towards the lower leaves and stays cooler underfoot, which many flower and nursery growers prefer. Black and white combinations give you a bit of both.

Most growers also use the printed lines. A mesh ground cover with stripe or grid lines makes it easy to set pots and grow bags in straight rows at equal spacing, which saves time at every planting cycle.

How do you get drainage right?

Drainage depends on what lies under the mat. The fabric is permeable, but it cannot fix a floor that holds water.

Clear old roots and stones, then level and compact the soil. Give the floor a gentle slope towards a drain channel or the polyhouse edge so excess water has somewhere to go. In low spots or heavy clay, a thin layer of sand or fine gravel under the walkways helps water move away faster.

Quick tip: Run a test irrigation before you lay the full mat. Any puddles that form on bare ground will form on the fabric too, so fix them first.

Installation and care tips

• Lay the fabric with the printed side up and keep it tight to avoid wrinkles.
• Pin it down with ground staples along the edges and at regular intervals.
• Overlap any joins generously and pin through both layers.
• Seal cut edges with gentle heat to stop the woven tapes from fraying.
• Sweep away soil and plant debris after each crop so weeds cannot root on top of the mat.

The UV-stabilised polypropylene in our mats is built for a life of around 5 years, and good care helps you get the full value from every roll. For more on equipping a modern structure, read our guide to protected cultivation technologies.

Key takeaway: Pick the GSM by traffic, plan the layout around single piece widths and prepare a level, sloped base. A well laid weed mat then keeps the polyhouse floor clean and dry for years.

Cover your polyhouse floor with GreenPro Ventures

GreenPro Ventures manufactures woven ground cover weed control fabric in multiple GSM options, colours and custom lengths for polyhouses, greenhouses and nurseries across India. Explore our ground cover range or contact our team with your bay measurements for a recommendation that suits your crops.

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