🌾 Corn

Grow corn in deep, fertile, well-drained soil (loam or sandy loam) with good aeration and high organic matter. Avoid compacted or waterlogged sites; raised beds/ridges help on heavy clays. Maintain even moisture (soil should be water-retentive but not soggy). Optimal pH is slightly acidic to neutral (about 5.8–7.0). Corn is nutrient-demanding, so incorporate compost/manure before planting and ensure adequate nitrogen during growth.

Sow corn (maize) after all danger of frost has passed and the soil has warmed (ideally at least 10–13°C / 50–55°F; warmer is better for quick germination). Choose a full-sun site with fertile, well-drained soil; incorporate compost or well-rotted manure before planting. Direct sowing (recommended): - Sow seeds 2.5–4 cm (1–1.5 in) deep in moist soil. - Space seeds 20–30 cm (8–12 in) apart in rows 60–90 cm (24–36 in) apart; thin to the strongest plant per station. - Plant in blocks (e.g., 3–6 short rows) rather than a single long row to improve wind pollination and ear fill. - Keep soil evenly moist through germination (typically 7–14 days depending on temperature). Transplanting (optional in short seasons): - Start seeds in individual pots 2–3 weeks before the last frost; sow 2.5 cm (1 in) deep. - Transplant carefully when seedlings are small (about 10–15 cm / 4–6 in tall) and nights are reliably warm; avoid root disturbance. Succession and timing: - For extended harvest (sweet corn types), make successive sowings every 10–14 days until mid-summer, allowing enough time to mature before the first expected autumn frost. After emergence: - Weed early (corn competes poorly when small) and mulch once soil is warm. - Water regularly, especially from tasseling through ear fill; drought at flowering reduces kernel set.

Corn (Zea mays) is a heavy feeder, especially for nitrogen (N). Base fertilization on a soil test where possible. - Before planting: Incorporate well-rotted compost/manure to improve soil organic matter. Apply phosphorus (P) and potassium (K) at or before planting if soil test indicates need; P is most critical early for root growth. - Nitrogen timing: Split N applications to reduce losses and match crop demand. - Apply a modest starter N at planting (often with P). - Side-dress the majority of N when plants are about 30–45 cm (12–18 in) tall (around the V6 stage). - A second side-dress may be used just before rapid growth/tasseling (around V10–V12) on sandy soils or where leaching is likely. - Micronutrients: Ensure adequate sulfur and zinc if deficiencies are common locally; correct based on soil/leaf tests. - Avoid late or excessive N: Heavy N after tasseling can increase lodging and delay maturity; overfertilization can also increase nutrient runoff. - Water and placement: Apply fertilizer when soil is moist and water in after side-dressing; keep granular fertilizers a few inches from stems to prevent burn. - Practical note: Sweet corn typically benefits from regular side-dressing; container or raised-bed plantings may need lighter, more frequent feeding due to limited soil reserves.

Mulch corn after the soil has warmed and seedlings are established (about 10–15 cm/4–6 in tall) to avoid slowing early growth in cool soil. Apply a 5–8 cm (2–3 in) layer of clean straw, shredded leaves, or finished compost between rows to suppress weeds and conserve moisture; keep mulch a few centimeters away from the stalks to reduce rot and pest hiding places. Replenish as it breaks down and avoid thick layers of fresh, high‑carbon materials (e.g., uncomposted wood chips) directly over the root zone unless additional nitrogen is supplied.