Illinois
Representative warm-season temperature is 21.4°C, inside the 15–30°C optimum. Annual rainfall is 1,019 mm, inside the 800–1,200 mm optimum rainfall band.
Field trace: warm_season_temp_c, annual_rain_mm
Commercial crop requirements
Growing Asparagus: climate, soil and water requirements
Asparagus has an optimum temperature range of 15–30°C within an absolute 6–38°C envelope.
Its profile calls for 500 mm of seasonal water and an optimum soil pH of 6–6.7.
How to read the figures
The crop profile is marked measured in confidence_tier. Regional figures are representative reference values, not coordinate-level measurements; every table and regional note names the field behind its figures.
Climate envelope
Use the optimum band for screening normal crop development and the absolute range as an outer tolerance boundary. Accumulated heat still depends on the local planting window and daily temperatures.
| Requirement | Profile value | Database field |
|---|---|---|
| Optimum temperature | 15–30°C | temp_opt_low_c, temp_opt_high_c |
| Absolute temperature range | 6–38°C | temp_min_c, temp_max_c |
| Heat to maturity | 900 growing degree days above a 6°C base | gdd_requirement, base_temp |
| Photoperiod | Long-day response; 12-hour critical daylength | photoperiod_type, critical_daylength_hours |
| Vernalisation | Not required | vernalization_required |
| Established-plant cold-hardiness limit | -30°C | cold_hardy_min_c |
Soil and pH
| Requirement | Profile value | Database field |
|---|---|---|
| Optimum pH | 6–6.7 | ph_opt_min, ph_opt_max |
| Tolerated pH range | 4.5–8.2 | ideal_ph_min, ideal_ph_max |
| Waterlogging tolerance | Intolerant | waterlogging_tolerance_category |
An intolerant rating means drainage is a screening constraint. Check infiltration, perched-water risk, field outlets and the duration of saturation before committing land.
Water
| Requirement | Profile value | Database field |
|---|---|---|
| Seasonal water requirement | 500 mm | water_need_mm |
| Optimum rainfall band | 800–1,200 mm | rain_opt_min_mm, rain_opt_max_mm |
| Absolute rainfall range | 500–4,000 mm | rain_abs_min_mm, rain_abs_max_mm |
Irrigation becomes necessary when effective in-season rainfall is below the 500 mm seasonal requirement. Convert that gap into a field schedule only after accounting for soil water storage, application efficiency and local rainfall timing.
Nitrogen demand
The profile assigns Asparagus nitrogen-demand category 3, which translates to moderate demand. The figure traces to nitrogen_demand; it is a category, not a fertiliser rate.
Set the field program from soil and tissue evidence, expected removals, prior-crop effects and local nutrient rules.
Crop-level reference profile
| Requirement | Profile value | Database field |
|---|---|---|
| Average yield | 5.55 t/ha crop-level reference average; not a regional measurement or forecast | avg_yield_per_ha_tons |
| Growing period | Not supplied; no day figure is stated | growing_period_days |
Where it grows well
These examples pass a stated temperature or rainfall comparison using representative regional values. They do not establish parcel viability.
North Carolina
Representative warm-season temperature is 23.9°C, inside the 15–30°C optimum. Annual rainfall is 1,060 mm, inside the 800–1,200 mm optimum rainfall band.
Field trace: warm_season_temp_c, annual_rain_mm
Pennsylvania
Representative warm-season temperature is 18.9°C, inside the 15–30°C optimum. Annual rainfall is 1,036 mm, inside the 800–1,200 mm optimum rainfall band.
Field trace: warm_season_temp_c, annual_rain_mm
Research basis
These papers support the qualitative interpretation of the crop profile. No paper-derived figure is used on this page; the named crop and region fields remain the only sources of displayed agronomic numbers.
- Soil Moisture Condition as a Growth-retarding Factor of Asparagus Cultivated in an Open Field
Persistently wet soil after rainfall is associated with weak asparagus growth, making soil-moisture behaviour and drainage relevant checks.
What we cannot tell you
This profile cannot set planting depth, row spacing, seeding rate, cultivar choice, fertiliser rate, harvest timing, irrigation schedule or drainage design. Those decisions depend on cultivar, local practice and field conditions.
The yield figure is not a field forecast, and this page does not estimate price, cost or profitability. Use a coordinate-level audit, local field evidence and commercial terms before a land or lending decision.
Crop profile source
source_citation: Wikidata & Literature (El-Saidy et al., 2011).