The early rainy season—especially in May—is a critical time for Thai farmers to begin preparing their soil to ensure high yields from cash crops. One effective and trusted technique among growers of various crops is improving soil with GreenCal Gypsum. This natural soil conditioner enhances calcium and sulfur levels, loosens compacted soils, and directly supports strong early plant growth throughout the growing season.

Here are four major Thai cash crops that can’t go without GreenCal Gypsum during this crucial period:

1. Cassava – Strong Roots, Bigger Tubers

Cassava relies heavily on a strong root system within the first 20–45 days after planting to support long-term tuber development. Supplementing the soil with calcium using GreenCal Gypsum strengthens the roots, promotes branching, and allows deeper soil penetration. The result? Larger, plumper, and heavier tubers—while minimizing problems like shriveled or cracked roots caused by poor soil structure.

2. Sugarcane – Fast Tillering, Strong Stalks

At the start of the rainy season, sugarcane needs to focus on quick tillering and building sturdy stalks. Applying gypsum early improves soil porosity and root development, which supports thick, robust cane growth. The calcium in GreenCal Gypsum also strengthens stem cells, helping the stalks stand tall and reducing lodging risks toward the end of the season.

3. Durian – Better Flowering, Firm Fruit, Strong Stems

As the rainy season begins, durian trees enter their flower and early fruit development stages. GreenCal Gypsum enriches the soil with calcium, boosting overall tree strength and nutrient uptake. It helps form tighter, more elastic skin on the fruit, reducing splitting. The fruit stems become tougher, minimizing premature fruit drop. Early calcium management = better fruit quality at harvest.

4. Wet-Season Rice – Healthy Roots, Strong Early Growth

Rice sown or transplanted from late May to June requires a robust root system to absorb nutrients and establish itself before floodwaters arrive. Applying GreenCal Gypsum during soil preparation adds calcium and sulfur, encouraging strong root development and early plant vigor. This supports effective tillering and paves the way for full panicle development in the coming months.

Why Choose GreenCal Gypsum?

✅ Ultra-fine gypsum particles ➡️ fast dissolution, quick plant absorption
✅ High in calcium and sulfur
✅ Certified by the Land Development Department – guaranteed quality
✅ Suitable for field crops, fruit trees, and wet-season rice