devil's tree (Alstonia scholaris), photographi

How to Grow Devils Tree

Alstonia scholaris · Zones 10-12

Devils Tree is grown for its foliage and the structure it brings to a planting. It's hardy across USDA zones 10 through 12. Its spring flowers are a moderate draw for moths and butterflies. It roots deep, which helps it reach moisture in a dry spell and open up tight soil as it establishes.

Devils Tree — the short answer

Devils Tree: grown in zones 10–12, full sun, pH 4.5–7.5.

USDA zones
10–12
Manual horticultural correction (source not retained); NC State Extension and Missouri Botanical Garden, with the remaining rows from other published sources or Growable Ground compilation
Soil pH
4.5–7.5
FAO ECOCROP
Sun
Full Sun
Growable Ground Plant Database

Plant data: Growable Ground Plant Database, compiled from FAO ECOCROP, USDA PLANTS and university Extension sources — each tile names its own row's source, because per-field provenance varies.

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Zone averages can't see the slope, soil, frost, and sun that decide whether devils tree actually takes — and those shift from one yard to the next. Enter your address and we'll score devils tree against your land's real conditions.

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What Devils Tree is

Devils Tree grows as a perennial. It blooms in spring.

How to grow Devils Tree

Devils Tree grows in USDA zones 10 through 12. Devils Tree does best in full sun — at least 6 hours of direct sun a day — and soil from pH 4.5 to 7.5, on well-drained ground. It needs a growing season of at least 300 frost-free days, which is why climate matters as much as soil.

USDA Zones

10-12

USDA PHZM 2023

Soil pH

4.5 - 7.5

FAO ECOCROP

Sun

Full Sun

Growable Ground plant catalog

Drainage

well (dry spells)

Growable Ground plant catalog

Minimum Growing Temperature

53.6°F

Below this it stops growing rather than dies — a pace limit, not a survival limit.

FAO ECOCROP

Frost-Free Days

300+

The frost-free stretch it needs start to finish — short-season areas may need an indoor head start.

Growable Ground plant catalog

  1. Start the season right

    Plant devils tree in full sun with at least 6 hours of direct sun, once the soil has warmed and frost risk has passed.

  2. Match the soil

    Devils Tree prefers pH 4.5 to 7.5 (FAO ECOCROP). A quick soil test from your local Extension lab tells you whether to add lime or sulfur to land in band.

  3. Water steadily

    Keep the root zone evenly moist through establishment. A 2–3 inch mulch layer holds moisture without waterlogging.

  4. Keep it in good form

    Prune devils tree to shape as it grows; the reward is its foliage and structure, not a harvest, so steady upkeep is the whole job.

Where Devils Tree thrives

Devils Tree is hardy across USDA zones 10 through 12. Zone is only the starting point, though: the soil pH, drainage, and frost dates on your specific land decide how well it actually does.

A USDA zone is a 10°F band of average annual extreme winter minimum, so zones 1012 spans average winter lows from 30°F to 60°F (USDA PHZM 2023). Across the 50 states and DC, that band covers none outright but splits 8 down the middle — and which side of that line your land sits on changes the answer.

Zones 10–12 highlighted on the USDA national hardiness zone map

Zones 10–12·Where Devils Tree growsOpen map →

Where Devils Tree stands, state by state

Devils Tree is rated for zones 1012 — a cold floor USDA puts at 30 to 40°F. Across the 50 states and DC, 0 sit fully inside that band, the line runs through 8 more, and 43 sit outside it — and inside every split state, the same line runs on at county grain.

The line runs through

8 states

3 of 8 shown

Devils Tree’s band covers part of each of these states — which side of the line your county sits on changes the answer, and each state page draws it.

Outside zones 10–12

43 states

3 of 43 shown

Winter cold is the limit here — the same plant often works in a container that comes under cover. Each link is that state’s own growing hub.

State zone extents: USDA Plant Hardiness Zone Map (PHZM) 2023. A zone is a 10°F band of average annual extreme minimum temperature, so a state that splits the band contains the boundary — its own page draws the county line, and a parcel report resolves which side your land sits on.

What grows around Devils Tree

Good to know

One caution for pet owners — devils tree is toxic to dogs and cats (moderate severity). Keep it out of reach, and call ASPCA Animal Poison Control at (888) 426-4435 in an emergency. (Source: Cornell Poisonous Plants Database.)

Devils Tree offers moderate value to bees and other pollinators.

Your land is one point inside Devils Tree's range

This page resolves to the species. Your state page draws the county line, and a report reads the parcel — the soil pH, drainage, sun, and frost dates on your exact ground, which no species average can see.

Free Report

See if Devils Tree will thrive on your land

Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether devils tree actually takes — we score it against the real conditions at your address.

Three things about your exact spot that zone averages miss:

Your soil pHYour frost-free daysYour sun & shade

We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.

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How we know this about Devils Tree

The figures above are cited per row, not per site: the pH band names this plant’s own source column, the three temperature figures each carry their own, and days-to-maturity cites the publication that actually lists it. All of it comes from the Growable Ground Plant Database — a compilation over FAO ECOCROP, USDA PLANTS, and university Extension sources, published openly with per-field provenance.

Grounded inUSDA PLANTS DatabaseUSDA PHZMASPCA

Frequently asked questions

Can I grow Devils Tree in my zone?

Devils Tree grows in USDA hardiness zones 10 through 12 (USDA PHZM 2023). Zone is one factor — soil pH, drainage, and frost dates on your specific parcel also shape whether it takes.

When should you plant Devils Tree?

Most growers plant devils tree after the last spring frost, once the soil has warmed, leaving enough of the season for its 300-day frost-free need. Your local frost dates set the exact window — a Growable Ground report reads them for your address.

How much sun does Devils Tree need?

Devils Tree needs full sun — a spot that catches at least 6 hours of direct summer sun a day. In more shade it still grows, but usually gives a smaller, later crop. The catch is that a yard rarely gets even light everywhere — a fence, the house, or one tall tree can quietly take those hours. A Growable Ground report reads the real sun-hours across your land, canopy and buildings included, so you can pick the brightest bed before you plant.

What soil does Devils Tree need?

Devils Tree prefers soil pH 4.5 to 7.5, on well-drained ground (FAO ECOCROP). Your report scores your parcel's actual soil against that using USDA SSURGO data.

Does Devils Tree attract pollinators?

Yes — devils tree's flowers are a solid nectar source for moths and butterflies.

Is Devils Tree safe for pets?

Devils Tree is toxic to pets (dogs,cats) with moderate severity. Keep it out of reach, and call ASPCA Animal Poison Control at (888) 426-4435 in an emergency. (Source: Cornell Poisonous Plants Database.)

Keep exploring Devils Tree

Devils Tree by USDA hardiness zone