Is Soft Tree Fern easy to grow?

Soft Tree Fern is manageable for most gardeners if sited correctly from the outset. The most common mistakes are poor drainage and incorrect sun placement.

How big does Soft Tree Fern get?

Soft Tree Fern typically reaches 3.7–4.6 m. Final size depends on soil quality and available root space. Allow adequate spacing at planting — most plants reach their full spread within 5–10 years.

How much sun does Soft Tree Fern need?

Soft Tree Fern grows best in partial sun. Planting in the wrong light level is the single most common cause of poor performance. Check the aspect of your site before choosing a position.

Is Soft Tree Fern suitable for a small garden?

Soft Tree Fern can reach a significant size and is better suited to larger gardens where root and canopy spread are not a constraint. For smaller spaces, consider a more compact alternative in the same genus or a dwarf cultivar if one is available.

Soft Tree Fern (Dicksonia antarctica)

About Soft Tree Fern

Soft Tree Fern (Dicksonia antarctica) is grown for garden performance matched to its site needs. Expect partial sun, typically 3.7–4.6 m tall, moderate water once established.

Sun Partial

Water Moderate

Height 12–15 ft (370–460 cm)

Spread 8–12 ft (240–370 cm)

Habit Fern

Season Spring, Summer, Fall, Winter

Hardiness Zones 9–12

Can Soft Tree Fern take your winter? Type your ZIP below and compare it with Zones 9–12.

2023 USDA ZIP listings (PRISM / USDA-ARS). Find Your USDA Hardiness Zone · Official USDA map.

Is Soft Tree Fern Right for Your Garden?

Best for

Larger gardens needing height, structure, or screening

Not recommended if

Small or confined spaces where root and canopy spread is a problem

Trade-off to know

Soft Tree Fern suits most garden soils when drainage is adequate. The main limitation is site scale — match plant size to available space.

Growing Conditions for Soft Tree Fern

Site checklist

Sun: partial sun
Soil drainage: Moist but Well Drained
Water: Moderate
Hardiness zones: 9, 10, 11, 12

Adjustments

Wrong light level is the most common cause of weak performance
Fix drainage before treating leaf symptoms

Shared growing steps for this plant’s group: How to Grow Tasmanian Tree Fern. Notes below stay specific to this plant.

How to Care for Soft Tree Fern

Establishment

Plant Soft Tree Fern in a site matching its sun and drainage needs
Water regularly until roots settle, then match watering to the plant’s need

Ongoing care

Mulch to buffer moisture swings
Remove dead or damaged growth in season
Avoid constant wet foliage where disease pressure is high
Plan support or pruning for long-term structure

Diagnosing Problems with Soft Tree Fern

Symptom	Likely cause	Confirming sign	Action
Leaves yellowing unevenly across the plant	Uneven watering or compacted soil	Yellowing worse on one side; soil hard or crusted at surface	Water Soft Tree Fern deeply and evenly. Loosen surface compaction with a fork; avoid disturbing main roots.
Sudden wilting on one branch while rest of plant looks healthy	Root rot from poor drainage in one spot	Affected branch has dark, mushy roots when gently uncovered	Cut back affected branch to healthy wood. Improve drainage in that area before the next growing season.
Dieback of branch tips after winter	Frost damage or wind scorch	Damage consistent across exposed side; wood brown inside tip	Prune Soft Tree Fern back to healthy green wood in late spring once growth resumes. Do not prune earlier — wait to confirm what has survived.

Leaves yellowing unevenly across the plant

Likely cause: Uneven watering or compacted soil
Confirming sign: Yellowing worse on one side; soil hard or crusted at surface
Action: Water Soft Tree Fern deeply and evenly. Loosen surface compaction with a fork; avoid disturbing main roots.

Sudden wilting on one branch while rest of plant looks healthy

Likely cause: Root rot from poor drainage in one spot
Confirming sign: Affected branch has dark, mushy roots when gently uncovered
Action: Cut back affected branch to healthy wood. Improve drainage in that area before the next growing season.

Dieback of branch tips after winter

Likely cause: Frost damage or wind scorch
Confirming sign: Damage consistent across exposed side; wood brown inside tip
Action: Prune Soft Tree Fern back to healthy green wood in late spring once growth resumes. Do not prune earlier — wait to confirm what has survived.

Soft Tree Fern FAQ

Is Soft Tree Fern easy to grow?

Soft Tree Fern is manageable for most gardeners if sited correctly from the outset. The most common mistakes are poor drainage and incorrect sun placement.
How big does Soft Tree Fern get?

Soft Tree Fern typically reaches 3.7–4.6 m. Final size depends on soil quality and available root space. Allow adequate spacing at planting — most plants reach their full spread within 5–10 years.
How much sun does Soft Tree Fern need?

Soft Tree Fern grows best in partial sun. Planting in the wrong light level is the single most common cause of poor performance. Check the aspect of your site before choosing a position.
Is Soft Tree Fern suitable for a small garden?

Soft Tree Fern can reach a significant size and is better suited to larger gardens where root and canopy spread are not a constraint. For smaller spaces, consider a more compact alternative in the same genus or a dwarf cultivar if one is available.

What Soft Tree Fern Symbolises

enduring
constant
steadfast
reliable