Sugarcane Cultivation Guide: Planting to Harvest

Soil, climate and season

Sugarcane wants deep, well-drained loam, pH 6.5–7.5, and a warm, sunny growing period with plenty of water. It does not tolerate waterlogging or salinity well. Main planting windows are the autumn and spring seasons in the subtropics; adjust to your local mill calendar. Prepare a fine, deeply ploughed seedbed with furrows.

Planting: use quality setts

• Use disease-free 8–10 month-old seed cane from a healthy crop; treat setts against borers and red-rot before planting.
• Cut two- to three-bud setts and place them end to end in the furrow, buds to the side, then cover 3–5 cm.
• Consider modern methods — single-bud chip/settling transplanting or the STP tray method — to save seed and get uniform stands.

Water and nutrition

Sugarcane is thirsty but responds hugely to efficiency. Drip irrigation with fertigation can cut water use sharply and lift both yield and sucrose. Critical water stages are germination, tillering and grand-growth; ease off near maturity. Feed a balanced NPK programme with the nitrogen split across early growth, plus potash for sucrose and lodging resistance. Base rates on a soil test.

Earthing-up, propping and ratoon

• Earth up as the crop grows to anchor it and prevent lodging; prop/tie tall cane against wind.
• Keep the crop weed-free for the first 3–4 months — the highest-value weeding window.
• After harvest, manage the ratoon: stubble-shave, gap-fill, and fertilise promptly for a cheaper second (or third) crop.

When to harvest

Harvest at full maturity for peak sucrose — judged by a brix (hand-refractometer) reading and mill advice, not just the calendar. Cutting immature or over-mature cane loses recovery. Cut close to the ground (the richest sugar is at the base), deliver to the mill quickly, and avoid burning where you can to protect soil and ratoon.