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How to Grow Cashew

Anacardium occidentale · Also called: cashew nut, caju, cajueiro, acajou, marañón, anacardo, kaju, kasoy

A cultivated cashew tree (Anacardium occidentale) with a broad, spreading canopy of leathery leaves, photographed at Pellikonda, India.

Photo: Adityamadhav83, CC BY-SA 4.0 (Wikimedia Commons)

Cashew is a real, resilient tree crop that feeds smallholder incomes across a genuinely wide tropical belt, from West Africa to East Africa to South and Southeast Asia, often on land too poor, dry or sandy for most other tree crops to survive on at all (growthHabitAndMethod). World production reached approximately 4.2 million tonnes in 2024, with Ivory Coast and India together growing about 41 percent of that total. Laisha's own curated crop-priority research finds cashew among the top ten crops grown in 10 of the world's 195 countries, spanning West Africa, East Africa and Southeast Asia -- and, distinctively among this library's own tree-crop guides, cashew is genuinely the single biggest crop of all in one of those 10 countries, Guinea-Bissau, rather than never ranking first the way this library's own avocado and mango guides find for their own crops (globalImportance). This crop also carries two real, genuinely separate safety stories worth knowing before a single tree is planted: its own hard shell contains a real caustic resin that must be destroyed by real processing before the kernel inside is safe to touch, and the finished, safely processed kernel is itself a real, documented tree nut allergen for a real share of the people who eat it (safetyWarningFirst). As with every crop in this library, any agrochemical used on this crop must be handled exactly according to this guide's own chemicalSafetyRule below, bought only from a licensed dealer, and never guessed at from a name half-remembered from a neighbour.

Global Importance

Cashew production is genuinely concentrated in West Africa, East Africa and Southeast Asia, and Laisha's own curated research finds it ranked among the top ten crops in 10 of the world's 195 countries -- and, unlike this library's own avocado and mango guides, genuinely the single biggest crop of all in one of them.

Market Segments

One cashew harvest genuinely splits into several real, separate markets that judge entirely different parts of the same fruit, from a caustic raw shell nobody eats to a fresh apple prized only near where it grows.

Growth Habit

Three real, foundational facts decide almost everything else a cashew grower does: it is a genuine long-lived evergreen tree that tolerates real drought and poor soil better than almost any other tree crop in this library; a modern dwarf, grafted or clonal planting bears far sooner and far more heavily than an old-style seedling tree; and its own nut cannot be safely eaten until real processing has destroyed the caustic resin inside its own shell.

Growing Cashew, Stage by Stage

  1. 1. Choose land, climate and site — Confirm your own real climate has a genuine dry season, and choose land for what this crop actually tolerates well -- real drought, poor or sandy soil -- rather than assuming it needs rich, moist ground.
  2. 2. Choose your planting material -- a real dwarf or grafted sapling where one exists — Buy a genuine dwarf, grafted or clonal sapling from a real, checkable nursery where one is available, because it bears several years sooner and several times more heavily than an unselected seedling.
  3. 3. Plant the sapling — Plant at the right depth, at the start of your local wet season, and protect the young tree through its first fragile months.
  4. 4. The juvenile years -- formative pruning and real intercropping — Use the real wait before first bearing productively, however short a dwarf tree makes that wait: shape the young tree's branches while they are still small, and consider a real intercrop for income while it establishes.
  5. 5. Water — A young tree needs real, regular water to establish. A mature tree genuinely tolerates real drought better than almost any other tree crop in this library, and actively wants dryness around flowering time.
  6. 6. Weed the base and feed the tree — Keep the ground under the canopy clear of competing growth, and feed a cashew tree per tree, not per hectare, increasing the amount gradually as the tree ages.
  7. 7. Flowering and the real accessory-fruit and true-fruit story — Recognise the real flowering window that follows a genuine dry spell, and understand honestly how one flower grows into two real, separate structures -- a swollen accessory fruit and, hanging below it, the true nut.
  8. 8. Manage the bearing tree -- pruning and canopy care — Prune to keep the canopy open, manageable and productive for decades, and check for pest damage and disease symptoms every time you are in the orchard.
  9. 9. Watch for tea mosquito bug, anthracnose and dieback -- and stop the rest getting in — A handful of real pests and diseases matter more than everything else in this crop. Most are far easier to catch early than to clear once established.
  10. 10. Know when to harvest — Watch the apple, not the nut, for the clearest real ripeness signal, and understand that most growers let the whole connected fruit fall naturally rather than picking it while still attached.
  11. 11. Separate, handle and dry the nut carefully — Separate the nut from the apple soon after collection, and treat the nut's own raw shell with real care from this very first handling step onward, since its caustic resin is exactly why this crop is never sold in-shell to consumers.
  12. 12. Process, store and sell it — Real processing, heat treatment that destroys the shell's own caustic resin, then careful shelling, is what turns a dangerous raw nut into the safe, familiar kernel a consumer actually buys, and it is honestly a processor's job, not a farm-level one.

Fertiliser Programme

Cashew is fed per tree, not per hectare, and the dose is meant to grow with the tree -- a small amount for a young, non-bearing tree, rising toward one real, published mature rate this guide could actually confirm live this session.

Common Problems & Troubleshooting

If you see: Blackened, dying shoot tips, blistered or distorted young leaves, and shrivelled or aborted flower clusters and young fruit, worst on tender new growth.

It likely means: Tea mosquito bug, most significantly Helopeltis antonii -- a real, live-confirmed "major host" pest of this crop on the EPPO Global Database's own cashew host-plant record, present across most of this crop's own tropical growing range.

Do this: Scout young shoots, flower clusters and developing fruit regularly, especially through flowering, since this pest causes the most real damage on tender new growth.

If you see: Dark, sunken spots on leaves, flowers and young developing nuts, sometimes merging into larger blackened patches in humid weather.

It likely means: Anthracnose, caused on this crop by Colletotrichum fructicola, a real, live-confirmed member of the wider Colletotrichum gloeosporioides species complex named specifically on the EPPO Global Database's own cashew host-plant record.

Do this: Prune to open the canopy and let air and light through, since a dense, humid canopy favours this fungus.

If you see: A white, powdery coating spreading across young leaves, flower clusters and small developing fruit, most active in humid weather during flowering.

It likely means: Powdery mildew of cashew, caused by Erysiphe quercicola, known under its own older synonym Oidium anacardii -- confirmed live under EPPO Global Database code OIDIAN, whose own English common name is literally "powdery mildew of cashew".

Do this: Prune for an open canopy that dries quickly after dew or rain, the same real cultural control this guide's own Stage 8 already teaches.

If you see: Whole branches wilting and dying back from the tip inward, sometimes with a real, sticky gum-like ooze visible on the bark of affected wood.

It likely means: Dieback and gummosis, caused on this crop by Lasiodiplodia theobromae, a real, live-confirmed fungal disease on the EPPO Global Database's own cashew host-plant record, and a genuinely broad-host-range fungus documented elsewhere causing dieback and gummosis on citrus and fruit rot on avocado and mango.

Do this: Prune out and destroy dead and dying wood promptly, cutting well back into clean, healthy tissue.

If you see: Small, slender insects with a real, visible reddish band across the body, clustered on the undersides of leaves and young shoots, alongside a silvery scarring on affected leaf surfaces.

It likely means: Red-banded thrips, Selenothrips rubrocinctus, also known as cacao thrips -- a real, live-confirmed "major host" pest on the EPPO Global Database's own cashew host-plant record.

Do this: Scout leaves and young shoots regularly, since this pest causes real cosmetic and, in heavy infestations, genuine growth damage.

If you see: Shrivelled, distorted young shoots and developing fruit, with a small, elongated, dark bug visible feeding directly on the affected tender growth.

It likely means: A real coreid bug, most significantly Pseudotheraptus wayi or Pseudotheraptus devastans -- both confirmed live on the EPPO Global Database's own cashew host-plant record, close relatives of the coconut bug documented on this same wider crop family.

Do this: Scout tender young shoots and developing fruit regularly, since this pest feeds directly on the parts a grower is trying to protect.

If you see: Small, round holes bored into the bark of stems and branches, sometimes with fine, powdery sawdust visible around the entrance.

It likely means: A real wood-boring ambrosia beetle, most significantly Euplatypus parallelus -- confirmed live on the EPPO Global Database's own cashew host-plant record, a genuine wood-boring pest rather than a leaf- or sap-feeding one.

Do this: Remove and destroy severely infested branches or, in extreme cases, whole trees, since these beetles breed inside the wood itself.

Real Farm Economics

Cashew's real economics carry a genuinely wide spread worth stating plainly: a traditional seedling planting waits years longer and earns several times less per hectare than a modern dwarf or grafted planting on comparable land, a real, checkable difference this guide can actually quantify rather than only describe.

Yield & Market Value

Growing the crop is only part of the job. The last part is knowing what a normal harvest looks like, and knowing what your cashew is actually worth before you agree a price with anybody -- and for this specific crop, this guide states a real, honest gap plainly: cashew is not one of the crops Laisha's own live Global Commodity Price service currently tracks.

Remember It This Way

If you forget every other page of this guide, keep these lines. They are the whole crop, in order, short enough to carry in your head.

Test Yourself: Identification

What crop is this, a broad, spreading evergreen tree with leathery leaves growing in a planted field?

What crop is this, a broad, spreading evergreen tree with leathery leaves growing in a planted field?

What is this small, branched cluster of pale green and reddish flowers at a shoot tip?

What is this small, branched cluster of pale green and reddish flowers at a shoot tip?

What is this swollen, colourful fruit with a hard, kidney-shaped nut hanging below it?

What is this swollen, colourful fruit with a hard, kidney-shaped nut hanging below it?

Honest Limits of This Guide

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Sources