Microgreen Mats — FAQ & Guidance

1. What Does GSM (Grams per Square Meter) Mean?

GSM (g/m²) describes the density of the mat. It’s directly related to thickness, water retention, and performance for microgreens.

Typical relationships:

• 400 g/m² — approx. 0.3 cm thick (Low water retention)
• 600 g/m² — approx. 0.5 cm thick (Medium water retention)
• 1300 g/m² — approx. 1.0 cm thick (High water retention)

All measurements are in centimeters (cm). L = Length, W = Width, H = Height.

2. Hemp Mats vs. Coco Mats — Which Is Better?

Hemp mats and coco mats are two common substrates discussed in the Microgreen-Mats blog. Each has its pros and cons:

Advantages of Hemp Mats

• Excellent water absorption and distribution
• No synthetic binders (mechanical needling process)
• Quick setup, low maintenance for growers

Advantages of Coco Mats

• Made from renewable coconut coir fibers
• Good airflow and drainage
• Can be composted after use

For detailed comparisons, see the articles on
microgreen-mats.com/blog.

3. What Tray Sizes and Mat Inserts Are Common?

The most popular trays for microgreens are:

• 1020 trays — 50 × 24 cm, ideal for larger crops
• 1010 trays — 23 × 23 cm, perfect for small-scale growing
• Custom-cut hemp mats and die-cut chains are also available to fit specific tray setups.

4. How to Minimize Mold on Microgreen Mats?

Mold can develop when humidity and water retention are too high. To prevent it:

• Ensure good airflow and ventilation around trays
• Avoid over-watering — mats should stay moist, not soaked
• Use clean trays and sanitize regularly
• Keep humidity under 70% whenever possible

More on this topic:
Managing Microgreen Mats to Minimize Mold Issues.

5. Wholesale, Custom Cuts & Pricing

The blog covers wholesale hemp mat options and custom dimensions. Here are the essentials:

• Bulk pricing depends on GSM, dimensions, and production volume
• Custom cuts improve fit for trays (may include setup costs)
• Lower GSM (e.g. 400 g/m²) mats are typically less expensive than higher GSM (600 g/m² or 1300 g/m²)

For inquiries, check the latest wholesale section on
microgreen-mats.com/blog.

6. How Does Thickness Affect Microgreen Growth?

• Thicker mats hold water longer, reducing watering frequency
• Overly thick mats can trap excess moisture — risk of mold
• Choose GSM based on crop type and watering schedule

See:
Optimize Your Microgreen Growth with Ideal Thickness.

7. Other Topics Covered

• Hemp grow mat rolls and bulk supply
• Microgreen pulp trays and eco alternatives
• Shipping samples internationally
• Certifications and sustainable sourcing
• Soil-free growing techniques

Full blog archive:
microgreen-mats.com/blog.