How to Propagate Boston Fern
The division method, step by step. Roots in roots already attached at division, ready for soil in 4–6 weeks to recover. Below are the steps that actually work plus the failure modes that get most propagations.
Step by step
Start with a section of the root ball with attached fronds and runners.
- 1
When the pot is overflowing with fronds, slide the entire plant out and lay it on its side.
- 2
Use a sharp serrated knife (a bread knife works well for dense root balls) to cut the entire root ball into 2–4 wedge-shaped sections.
- 3
Each section should have a generous fan of fronds on top and a thick mass of roots and runners on the bottom.
- 4
Pot each section in standard potting mix at the same depth, water thoroughly, and trim away any damaged or yellowing fronds.
- 5
Place in bright indirect light with high humidity (60%+). A pebble tray or humidifier helps recovery dramatically.
- 6
Some frond loss is normal for the first 2–3 weeks. New growth at the center signals successful establishment.
Common failure modes
- Letting humidity drop below 40% during recovery — boston ferns crisp fast
- Cutting sections too small — each piece needs a substantial root mass to support its fronds
- Direct sun on a stressed division — burns the fronds within hours
For full Boston Fern care — light, water, humidity, pests — see the Boston Fern care guide. Or browse all species guides.