Starting Mango Seeds Indoors: A Complete Guide

Growing a mango tree from seed is a fun, long-term project. While grafted trees fruit in 3–5 years, seedlings take 5–8+ years and may not match the parent fruit. But the process is rewarding—and here's how to do it right.

Seed Preparation

1. Remove the large, flat seed (kernel) from the fibrous husk. Carefully cut the husk open—don't damage the kernel.
2. Optional: Soak kernel in water 24 hours to hydrate.

Germination Methods

Method A: Paper Towel (Fast, Visible)

1. Wrap kernel in damp paper towel; place in sealed bag.
2. Keep warm (80–85°F ideal). Check daily.
3. Root emerges in 1–3 weeks. Plant immediately.

Method B: Direct in Pot

1. Plant kernel on its side, 1 inch deep in well-draining mix (peat/perlite/sand).
2. Keep soil moist, warm, and humid (cover with plastic dome).
3. Sprout appears in 2–4 weeks.

Seedling Care

• Light: 14+ hours daily. Use fluorescent or LED grow lights 3–4 inches above plants.
• Temperature: 75–85°F day / 65–70°F night.
• Water: Keep evenly moist; avoid waterlogging.
• Fertilizer: After 2nd true leaf, feed biweekly with half-strength fish emulsion or seaweed extract.
• Air flow: Small fan on low prevents damping-off fungus.

Long-Term Notes

• Mangoes are tropical—protect from temps below 40°F.
• Repot annually; use deep pots for taproot.
• Expect variability: seedling fruit may differ in flavor, size, color.
• For guaranteed fruit quality, buy a grafted tree of a known cultivar.

Whether for fruit or foliage, a seed-grown mango makes a stunning houseplant or patio specimen.