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☀️ Climate & Soil
Aloe survives neglect and drought, but it cannot survive cold feet. Two conditions rule everything: warmth without frost and soil that drains.
Climate requirements
| Factor | Ideal | Tolerance / notes |
|---|---|---|
| Temperature | 25–40 °C for active growth | Growth slows below ~15 °C; damage below 5 °C; frost kills. In Mediterranean climates protect young plants in winter. |
| Rainfall | 500–1,000 mm, well distributed | Tolerates 250–1,900 mm if drainage is perfect; high rainfall zones require raised beds. |
| Sunlight | Full sun for maximum leaf yield | Very young nursery stock benefits from 30–50% shade for a few weeks; established crop wants open sky. |
| Altitude | Sea level to ~1,200 m | Higher altitudes work where frost is absent. |
| Humidity | Low to moderate | High humidity + wet leaves raises fungal disease pressure; wider spacing helps airflow. |
| Wind | Moderate | Very hot desiccating winds scorch leaf tips — windbreaks help in arid zones. |
Hard limits
Frost is lethal — never plant in frost pockets, valley bottoms or cold north-facing slopes. Waterlogging for even a few days can rot the shallow roots and kill the stand.
Temperature tolerance range
Below 5°C
Lethal
5–15°C
Damage
15–25°C
Slow
25–40°C
Ideal
Above 40°C
Tolerant
Rainfall tolerance
Soil pH preference
Water relations: why aloe sips instead of gulps
Aloe vera uses crassulacean acid metabolism (CAM). Unlike ordinary plants, it keeps its stomata (breathing pores) closed during the hot day and opens them only at night, storing captured CO₂ as organic acids until daylight. The consequences for you as a farmer:
- Extreme water-use efficiency — aloe produces biomass with a fraction of the water a conventional crop needs.
- Slight overnight acidification of leaf sap — one reason gel chemistry (and processing schedules) matter.
- Under irrigation, less really is more. Overwatering does not just waste water — it actively causes root rot, dilutes gel solids, and produces watery, low-quality leaves.
- Mild stress is fine. A slight wilt look at peak afternoon heat is normal; aloe recovers overnight. Persistent morning wilt means real trouble.
Soil requirements
- Texture: well-drained sandy loam to loam is ideal. Sandy soils need more frequent, lighter feeding and irrigation; clay soils are a liability unless reworked with sand/organic matter on raised beds.
- Depth: at least 45 cm of workable soil for roots and ridging.
- pH: 7.0–8.5 (neutral to mildly alkaline). Aloe tolerates moderately calcareous soils; below pH 5.5, lime before planting.
- Salinity: moderately tolerant — one reason aloe suits marginal lands — but high salinity still reduces yield and leaf quality.
- Organic matter: moderate. Incorporate 10–15 t/ha well-rotted FYM/compost at land preparation.
- Drainage: the non-negotiable. If a soil holds standing water after rain, choose another field or build raised beds and surface drains.
Site selection checklist
- No frost occurrence (check 10-year records, ask neighbours).
- Field does not puddle after heavy rain; has a natural or engineered outlet for excess water.
- Sandy loam or loam; soil test shows pH 7.0–8.5.
- Access to supplemental water for dry spells (drip preferred) — even drought-tolerant crops need establishment water.
- Reasonable road access for loading fresh leaf — buyers expect quick turnaround.
- Free of perennial weeds (e.g., Cyperus nut sedge) or a plan to control them before planting.
- Not previously waterlogged/rotten aloe ground without remediation — old rot pockets carry disease.
- Within economical distance of a buyer or processing unit.
Land preparation
Do this once, do it right — the stand then produces for 3–5 years:
- Clear and plough. Remove previous crop debris and stones. Plough 2–3 times to break clods and expose pests; a deep ploughing once in 3 years helps.
- Incorporate manure. Spread 10–15 t/ha well-rotted farmyard manure or compost and mix into the topsoil during the final tillage.
- Grade for drainage. A gentle slope or graded layout so surplus water exits the field; dig surface drains in monsoon zones.
- Form ridges and furrows or raised beds.
- Ridges & furrows: the standard in drier regions — plants on ridges, furrows carry irrigation water and drain excess rain.
- Raised beds: preferred in high-rainfall areas; two rows per bed is common.
- Flat planting: only on very sandy, free-draining soils.
- Basal fertiliser. Apply the recommended basal dose (see Plant Care — Nutrition) and mix into the ridge/bed soil at planting time.
- Pre-irrigate. A light pre-planting irrigation settles the soil so suckers establish in moist (not sodden) ground.
Tip
If your region gets intense monsoon rain, orient ridges/beds along the slope with a slight gradient so water escapes rather than pools — and keep a spare drain shovel handy through July–September.