Science · Specimen Trees
Harpephyllum (Kaffir Plum)
A southern African evergreen shade tree bearing small plum-like fruits, not a true Prunus plum. The catalog retains an outdated common name; wild plum is a preferable descriptive name.
Harpephyllum caffrum · Evergreen subtropical fruit and shade tree
Profile
- Identity
- Family Anacardiaceae, not Rosaceae.
- Reproduction
- Usually separate male and female trees; fruiting requires suitable pollen.
- Planting
- Set the root flare at grade and protect the expanding root zone from compaction.
- Assessment
- Confirm identity, local climate suitability and drainage before prescribing care.
Water & soil targets
- Moisture (VWC)
- Site-calibrated; varies by soil and rootstock
- Salinity tolerance
- Avoid assuming coastal planting means tolerance of saline irrigation.
- Drought tolerance
- Moderate once established.
Optimal root measurement depth
8–18 in
Most absorbing tree roots live in the upper 12–18 inches, out toward the drip line. Typical guidance; confirm with a soil probe on site.
Water young trees consistently and established trees deeply during extended drought; keep soil aerated and account for a broad, vigorous root system.
Problems to watch
- Scale insects
- Root and paving conflicts
- Cold injury
Stress signs
- Leaf scorch
- Sparse growth after cold
- Branch-tip death
Where you'll find it
- Large subtropical shade
- Wildlife and ornamental fruit
More specimen trees
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All Science profilesGeneral agronomic guidance and typical ranges; actual targets vary by site, soil, climate and season.