Coffee has many varieties, but in Vietnam the main ones are Robusta (Coffea canephora) and Arabica (Coffea arabica). Y5cafe has published several guides on coffee cultivation and care; here is an overview of the principal methods and procedures for raising coffee seedlings.
Two Main Propagation Methods
Table of Contents
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Sowing in plastic nursery bags
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Sowing directly in seedbeds
Both methods require a well-prepared nursery with shading structures and regular care.
In recent years, most coffee and fruit growers have shifted from sowing directly in seedbeds to raising seedlings in nursery bags because:
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Fertilizer and care are concentrated within each bag.
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Nursery area is used more efficiently.
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When transplanted, seedlings have a high survival rate because the root system remains intact.
The downside is higher cost—due to the price of plastic bags and labor to fill them. Direct seedbed sowing avoids bag costs and labor, but digging and lifting seedlings for transplanting easily damages roots and is no longer recommended for perennial crops.
Harvesting and Preparing Coffee Seeds
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Collect fully ripe cherries from high-yield, disease-free trees.
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Hand-pulp the cherries, wash the beans, then ferment them in a small container until the mucilage separates.
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Rinse clean; discard any beans that float.
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Dry the parchment beans in a shaded, airy place until moisture is about 20%—they start around 60–70% after pulping.
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Traditionally, beans may be planted immediately once properly prepared.
Sowing in Nursery Bags
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Bag size: 17 cm × 25 cm, with eight drainage holes at the bottom.
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Soil mix per bag:
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1.8 kg topsoil (fertile, clean, friable)
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0.25 kg well-decomposed farmyard manure
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8 g superphosphate
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Mix thoroughly, fill each bag with about 2 kg of the blend and tamp lightly so the base is firm.
Arrange the bags in rows (beds 1–1.2 m wide) with 40–45 cm paths for access. Bank soil up to one-third of bag height. Provide a shade frame 1.8–2 m high with movable panels to adjust sunlight.
Seed Treatment and Pre-germination
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Dissolve 0.5 kg of slaked lime (or wood ash) in 20 L of water, stir, let settle, and use the clear lime water heated to ≈60 °C.
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Soak the beans for 20–24 hours, rinse thoroughly, and remove all floating, black, or deformed seeds.
Small batches:
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Line a basket with clean dry straw or grass, cover the seeds with a damp burlap sack.
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Keep moist and warm (≈30–32 °C), watering with 60 °C warm water to maintain humidity.
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After 2–3 weeks, seeds will sprout.
Large batches:
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Spread a 4–5 cm layer of clean sand on a hard, draft-free floor (cement or brick).
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Cover with burlap, spread the treated seeds 4–5 cm thick, top with another thin sand layer and burlap plus dry straw.
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Water with 60 °C warm water morning and evening to keep evenly moist and warm until sprouting.
Planting the Sprouted Seeds
Once radicles emerge, plant immediately:
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Poke a 1 cm hole in the center of the bag, place the seed flat, with the flat side down, and cover with a thin layer of fine soil.
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Top with a 1 cm layer of sawdust or rice husk mulch and water gently.
Every 10–15 bags, sow 2 seeds in one bag as a reserve for gap-filling later.
Watering and Care
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In dry season, water every few days using a fine spray (watering can with rose head or clean sprayer).
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When seedlings have one pair of “pinhead” leaves and later two pairs of true leaves, feed with diluted manure tea or 0.1% urea solution, then rinse foliage with clean water.
Provide good drainage channels to prevent flooding. Weed regularly and break any soil crust on bag tops.
If insect damage occurs (e.g., crickets), hand-pick or, if severe, use light insecticide solutions sparingly.
Hardening and Transplanting
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Gradually accustom seedlings to full sunlight once they have one pair of true leaves, widening the shade gaps until, about 30 days before field planting, the shade can be removed completely.
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Transplant when seedlings are 6–7 months old, >20 cm tall, with ≥5 pairs of true leaves, straight stems, healthy roots, and no pest or disease symptoms.
Sowing Directly in Seedbeds (Less Common)
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Prepare raised beds 1.2 m wide and 20–25 cm high, incorporating ≈400 kg of well-rotted manure per 100 m².
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Place pre-germinated seeds 20 cm × 20 cm apart, cover with a thin soil layer and 1 cm of rice husk or sawdust.
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Care and watering are similar to the nursery-bag method.
Summary
Sowing in plastic nursery bags, though more costly, ensures higher survival and easier transplanting with minimal root disturbance, making it the preferred propagation method for Robusta and Arabica coffee in Vietnam today.