Central Valley Almond Orchards — Live Satellite Health Report

About this region

California’s Central Valley produces roughly 80% of the world’s almonds — a staggering concentration on millions of irrigated acres stretching from Bakersfield to Redding. Almonds are the state’s most valuable agricultural export, and the orchards are sustained by an increasingly stressed network of surface water deliveries and groundwater pumps. In some areas, aquifer overdraft has caused measurable land subsidence, making water the defining constraint on the entire industry.

Climate & growing cycle

The climate is hot Mediterranean: dry summers, wet winters, with summer temperatures regularly exceeding 38 °C. Almonds bloom dramatically in February–March — the famous “pink peak” visible from satellite when millions of acres turn pink simultaneously. Nuts set through spring and harvest in August–September by mechanically shaking the trees. NDVI follows a distinctive pattern: a spring peak at canopy development, stability through summer, then a rapid drop at harvest as leaves are shaken off with the nuts.

Satellite monitoring insights

Water stress — detectable in NDMI — is the central management concern in the almond belt. A falling NDMI in July directly signals inadequate irrigation during kernel fill, when water demand peaks. NDRE (chlorophyll) tracks nitrogen status and overall tree vigour through the growing season. NDVI runs between 0.3–0.6 depending on tree age and spacing, with younger, more densely planted orchards running higher. The distinctive harvest-triggered NDVI drop is one of the most striking seasonal signals in global agriculture — entire counties go from green to bare in weeks.

Key metrics

Index	Typical range	Management signal
NDVI	0.3–0.6	Spring peak, harvest crash in August
NDMI	−0.2 to 0.2	Irrigation adequacy — the defining index
NDRE	0.2–0.4	Chlorophyll and nitrogen status

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