Wild Plum American (Red) Plum August Plum

Prunus americana

Rosaceae · broadleaf deciduous shrub · native

Last updated

Quick Facts

Height
24 ft
Spread
15-25 ft
Growth Rate
Moderate
Light
Full Sun
Soil
Wet Tolerant
Water
Moderate
Hardiness
Zone Zones 3a–8b
Bloom Time
March
Fall Color
Yellow, red
Origin
from Massachusetts to southern Ontario and Manitoba
Watch for this season
Brown Rot Blossom Blight and Fruit RotHigh

Bloom Infection Window (Critical)

Coryneum blight (Shothole)High

Primary Infection - Flowers and Young Leaves

Cytospora CankerHigh

Spring Canker Activation

RustHigh

Aecial Stage (Alternate Host)

+ 17 more — see full disease and pest lists below

Phenological Calendar

Stage Typical Window
Bud break BBCH 07 Feb 15-Mar 15
Bloom start BBCH 61 Mar 1-Mar 31
Bloom end / petal fall BBCH 69 Mar 15-Apr 15
Leaf emergence BBCH 11 Apr 1-Apr 30
Fruit/seed development BBCH 71 Jun 1-Aug 31
Fruit/seed maturity BBCH 85 Sep 1-Nov 30
Leaf drop BBCH 93 Oct 15-Nov 30
Dormancy BBCH 97 Nov 15-Feb 28

Diseases: Regionally Documented (53)

Witches'-broom (Cherry leaf curl) Verticillium dahliae Verticillium Wilt Stigmina carpophila Shothole (Coryneum Blight) Prunus necrotic ringspot virus (PNRSV) Prunus Necrotic Ringspot Multiple obligate biotrophic fungi (Erysiphales: Erysipha... Powdery Mildew Necrotic rusty mottle virus (uncharacterized) Necrotic rusty mottle Mottle leaf Little cherry virus-1 and Little cherry virus-2 Little Cherry Symptom category — not a single disease Leaf Spot Pseudomonas syringae pv. syringae (bacterial canker complex) Dead Bud Cytospora spp. (Valsa spp., Leucostoma spp.) Cytospora Canker Rhizobium radiobacter (formerly Agrobacterium tumefaciens) Crown Gall Monilinia fructicola and M Brown Rot Blossom Blight and Fruit Rot Apiosporina morbosa Black Knot Pseudomonas syringae pv. syringae Bacterial Canker Armillaria spp. — primarily A Armillaria Root Rot Plum pox virus (PPV) Plum Pox (Sharka) Xanthomonas arboricola pv. pruni Red Spot Fruit Blemish (Freckles) Stigmina carpophila or Diaporthe spp. Shothole Chondrostereum purpureum Silver Leaf Multiple Basidiomycete fungi cause wood decay in trees Wood Decay An uncharacterized Black Canker Cherry twisted leaf-associated virus Cherry Twisted Leaf Believed to Crinkle Leaf and Deep Suture Eola rasp Eola Rasp Leaf (Yellow Bud Mosaic) Although bacterial Fungal Cankers June Drop Grapevine leafroll virus Leafroll Uncharacterized graft Necrotic Rusty Mottle (Lambert Mottle) and Rusty Mottle Phytophthora spp. (P Phytophthora Root Rot Multiple fungal agents Pitting Many fungi Postharvest Rots Prune dwarf Prune Dwarf Cherry rasp Rasp Leaf Pythium spp., Phytophthora spp., Rhizoctonia spp., Fusari... Replant Disease This problem Rosette [VERIFY] (multiple possible causes) Rugose Several causes Stem Pitting Cherry leafroll virus (CLRV); complex with prune dwarf vi... Virus-induced Cherry Decline Raspberry bushy dwarf virus and related viruses Virus Candidatus Phytoplasma pruni X-Disease Taphrina deformans Leaf Curl Russeting Chrysomyxa piperiana Rusty Spot Split Pit Sprinkler Rot (Phytophthora Fruit Rot) Taphrina pruni Plum Pockets Multiple genera (Melampsoridium, Thekopsora, Naohidemyces... Rust Wilsonomyces carpophilus Coryneum blight (Shothole) Xiphinema americanum and related species Nematode, Dagger Mesocriconema spp Nematode, Ring Pratylenchus penetrans (primary) and P Nematode, Root-lesion Various plant-parasitic nematode genera Nematodes

Pests: Regionally Documented (31)

Data Maturity
Structured Multiple sources. Expert review underway.