Monterey Pine

Pinus radiata

Pinaceae · coniferous tree · introduced

Last updated May 24, 2026

Plant Profile

Size & Form

Height

50–100 ft

Spread

32 ft

Growth Rate

Fast

Size at 20 yr

65 ft

Lifespan

Moderate

Site Requirements

Light

Sun to Part Shade

Soil Drainage

Well Drained

Soil pH

4.5-5.2

Water

High

Drought Tolerance

Low

Hardiness

Zones 8a–8b

Ornamental Interest

Bloom Time

february to march

Origin

North America

Damping-offHigh

Seedling Emergence - Postemergence Damping-off Risk

Pine needle scaleHigh

Crawler Emergence

Armillaria Root RotModerate

Active Below-ground Growth

Cyclaneusma Needle CastModerate

Spring Needle Infection

+ 4 more — see full disease and pest lists below

Diseases: Regionally Documented (24)

Endocronartium harknessii Western Gall Rust Cronartium ribicola White Pine Blister Rust Phytophthora spp. (P Phytophthora Root Rot Lophodermium spp. Lophodermium Needle Cast Lophodermella concolor Lophodermella Needle Cast Elytroderma deformans Elytroderma Needle Cast Arceuthobium spp. (parasitic plant) Dwarf Mistletoe Armillaria spp. — primarily A Armillaria Root Rot Symptom category — not a single disease Canker Cyclaneusma minus Cyclaneusma Needle Cast Several soilborne Damping-off Dothistroma septosporum (and/or D Dothistroma Needle Blight (Red Band) Gray Mold Heterobasidion occidentale Otrosina & Garbel Heterobasidion Root Disease In most Hypocotyl Rot and Root Rot Davisomycella medusa Medusa Needle Blight Rhabdocline spp. including R Needle Cast Needle Rusts Bursaphelenchus xylophilus Pine Wilt Excess sodium chloride Salt Damage Sirococcus conigenus Sirococcus Shoot Blight Fomitopsis officinalis, Porodaedalea pini, and other wood... Stem Decay Diaporthe vaccinii or Diplodia tip blight agents Tip Blight Multiple fungal species cause twig blight on different ho... Twig Blight

Pests: Regionally Documented (18)

Eriophyidae (family) Eriophyid mite Pineus strobi Pine bark adelgid Dioryctria spp. Coneworm Pine Aphid Pissodes strobi White pine weevil Tetranychidae Spider mite Synanthedon sequoiae Sequoia pitch moth Pine Needle Sheathminer Pine Sheath Miner Chionaspis pinifoliae Pine needle scale Pine Butterfly Coloradia pandora Pandora moth Dendroctonus ponderosae Mountain pine beetle Rhyacionia buoliana European pine shoot moth Nuculaspis californica Black pineleaf scale Neodiprion spp. Pine sawfly Eulachnus agilis Powdery pine needle aphid Otiorhynchus spp. Root weevil Schizolachnus piniradiatae Woolly pine needle aphid

Phenological Calendar

View full calendar (5 stages)

Stage	Typical Window	What to Look For
Candle elongation BBCH 11	Feb 15-Mar 15	Pale, elongating shoots (candles) covered in papery scale leaves. Three needles per fascicle emerge as candle extends
Pollen release BBCH 61	Feb 1-Feb 28	Male strobili usually clustered at base of current year's candles; yellow pollen visible
Pollen shed complete BBCH 69	Mar 1-Mar 15	Female conelets (small, reddish or purple) visible at shoot tips after pollination
Cone development (year 1-2) BBCH 71	Jun 1-Aug 31	Cones elongate. Three-needle fascicles characteristic. Serotinous cones (remain closed until fire/heat) with asymmetrical shape. Mature over second year
Cone maturity and seed shed BBCH 85	Sep 1-Nov 30	Asymmetrical woody cones remain sealed at maturity. Fire-adapted; cones open when exposed to heat, releasing winged seeds

Data Maturity

Structured Multiple sources. Expert review underway.