Coffee replanting techniques

Coffee replanting is not "uprooting and replanting". The failure rate if done wrong can be up to 60%. Instructions on the 24-36 month process from soil rotation, choosing varieties for replanting, to taking care of the first 2 years — according to WASI recommendations.

Summary: The Central Highlands has more than 100,000 hectares of coffee that need to be replanted in the 2020-2030 period, but in reality many replanting orchards fail — new trees die en masse due to "diseased" soil accumulated from old orchards. This article guides the standard replanting process according to the WASI Institute: DO NOT replant immediately after uprooting the old orchard. There must be 2-3 years of crop rotation + soil improvement + choosing the right variety.

Applies to: Coffee orchards 25-30+ years old, productivity reduced < 1.5 tons of beans/ha, accumulated pests (nematodes, cicadas, chronic rust).
Duration: 24-36 months of renovation + 3-4 years of replanting trees for business.
Difficulty level: Advanced. One wrong step = total failure.
Estimated additional costs: 60-120 million/ha for renovation. 80-150 million/ha of trees + planting.

Why does "immediate uprooting and replanting" fail

Old coffee orchard land has 3 invisible accumulated problems:

Root-knot nematodes (Meloidogyne, Pratylenchus) — destroy young coffee roots. Spores survive 3-5 years in the soil.
Fusarium oxysporum fungus — causes yellow leaves and root rot. Lasts 4-7 years.
Soil microbial imbalance — decades of using chemical fertilizers have depleted soil of beneficial microorganisms.

Planting coffee seedlings immediately after uprooting the old orchard = placing the seedlings in a hostile environment. A mortality rate of 30-60% in the first year is normal in "impatient" replanting orchards.

This is why WASI recommends a minimum crop rotation period of 2 years (ideally 3 years) before sowing new coffee varieties.

Decide before uprooting the old orchard

[ ] Really evaluate whether to replant: if the orchard still has a yield of 1.8-2 tons/ha, there is no need to replant. Renovation + nutritional supplementation + individual dead tree replacement may be more effective.
[ ] Soil analysis sample before extraction: pH, OC%, NPK, microbiology, nematodes. Know the current ground level.
[ ] 3-5 year financial planning: replanting = loss of income for at least 4 years. Is there another cash flow to compensate?
[ ] Decide on the replanting model: complete replanting (fast but loss of income) or replanting each plot in rotation (slower but with continuous income).
[ ] Choose rotation crops that are suitable for the land + have a market.

4-stage process

Year 1: Uprooting old orchard + soil treatment

Plucking tree + roots: pull out the main roots with a machine. It is forbidden to leave roots underground — it contains pathogens.
Burn + bury away from the orchard: old trees + leaves + branches must be carried far away, not buried in the orchard again.
Deep plowing + drying the soil: plow 30-40cm, drying the soil for at least 2-3 months in the dry season. Sunlight reduces nematodes + fungi.
Lime + fused phosphate: 1.5-2 tons of lime + 500-800 kg of fused phosphate/ha.
Plant rotation crops right at the beginning of the rainy season.

Year 1-2 (or 1-3): Crop rotation

Purpose: improve soil, reduce pathogens, increase microorganisms. Suitable trees:

Soybeans, peanuts, green beans — best N-fixing, soil-improving legumes. WASI's top recommendations.
Corn, cassava — short-term economic, but does not improve land like legumes.
Green cover crop (sunn hemp, green manure crop): if you don't need income, this is the best land improvement option.

DO NOT plant: other coffee, cocoa, pepper, cashew — same family or same pest.

During the crop rotation period:

Organic fertilizer yields 20-30 tons/ha/year.
Apply Trichoderma 200-300 kg/ha — microorganisms that fight fungal diseases.
Monitor weeds and nematodes — take regular samples.

Years 2-3: Prepare to sow coffee seeds

After rotating crops for 2 years, take soil samples again to check:

pH KCl 5.5-6.5.
OC% increased ≥ 0.5% compared to before.
Nematodes < 50/100g of soil (safe level).

If successful → prepare for sowing. If not achieved → rotate crops for another year.

Prepare 3-6 months before planting:

Digging ditches, building tires like a new orchard.
Organic fertilizer + phosphorus + base lime.
Install irrigation system.
Prepare the seedlings.

Years 3-4: Replanting coffee

Choose varieties for replanting:

TR4, TR9, TR11, TR12 — high-yielding, disease-resistant Robusta varieties from WASI.
How to plant: 6-8 month old seedlings, 25-35cm tall, trunk diameter ≥ 5mm.
Density: 1,000-1,100 trees/ha (3m × 3m or 3m × 3.5m).

Note:

Planted at the beginning of the rainy season (May-June in the Central Highlands).
Apply base fertilizer to the hole before placing the tree: organic 5-7 kg/tree + 200-300g fused phosphate.
Water evenly every 2-3 days in the first month.
Shade 30-50% with supporting plants (dragon beans, climbing soybeans).

Follow up the first 2 years

[ ] Survival rate after 30 days, 90 days, 12 months. Target ≥ 95% after 12 months.
[ ] Growth in height + trunk diameter every 2 months.
[ ] Yellow leaves / wilting / nematode signs — check every 2 weeks.
[ ] Producing level 1 + level 2 branches: 12 month old tree should have 3-4 level 1 branches. 24 month old tree should have 8-12 level 1 branches.
[ ] First flower bud — usually in year 3, should not be pressed earlier.

Handling dead / poor trees

Death rate < 5% in the first year: normal. Replant with trees of the same age from the backup orchard.

Death rate 5-15%: check the cause — nematodes, root fungus, incorrect planting techniques. Treat according to cause + replant.

Death rate > 15%: serious sign. The land has not been improved enough. Dig up soil samples + dead tree roots for analysis. Crop rotation may be necessary for another year, especially in areas with a history of heavy nematodes.

Common mistakes of replanting orchards

Replanting coffee immediately after uprooting the old orchard: ignore the recommendation of 2 years of crop rotation. Mortality rate is 30-60% in the first year. This is the most common mistake.

Choose old variety (Robusta TR9 without selection) instead of new TR4, TR11: orchard yield is 20-30% lower.

Strong chemical fertilization in the first year: seedlings cannot absorb it + roots burn. In years 1-2, organic matter + fused phosphorus are mainly needed.

No crop rotation because "wasting land": lack of understanding that crop rotation = investment in future coffee orchards.

Skip soil analysis before sowing seeds again: planting coffee in soil that is not yet clean of pathogens = repeat failure.

Replanting records

This is a 5-6 year long project. Notes need to be complete:

Results of soil analysis before, between, and after crop rotation.
Crop rotation: type + yield + organic returns to the soil.
Renovation materials: lime, phosphate, organic matter, Trichoderma — volume + cost.
Replanting seed source + planting date + quantity.
Survival rate, death rate, reason for death of each tree.
3-year business input productivity.

This data is valuable for deciding on the next replanting phase.

References

*Coffee replanting process in the Central Highlands* — WASI Institute, 2018 updated 2024.
*Recommended Robusta coffee varieties* — Department of Crop Production + WASI, 2023.
*Nematode management in coffee replanting* — IPI, 2020.