Growing Guide — PawpawSeeds.com
Why pawpaw is one of the easiest fruit trees to grow — and what to watch for anyway
Pawpaw is remarkably pest-resistant compared to most fruit trees. The leaves, bark, and seeds contain acetogenins — compounds that are toxic to many insects and animals. Deer avoid the foliage. Most common orchard pests don't touch it. This is one of pawpaw's major practical advantages for the small-scale grower who doesn't want to spray.
The zebra swallowtail is a striking black-and-white striped butterfly found throughout the eastern U.S. — and pawpaw is its only larval host plant. The caterpillars feed exclusively on pawpaw leaves; the adult butterfly can only survive near pawpaw trees.
In an orchard setting, zebra swallowtail caterpillars may eat a noticeable amount of foliage, particularly on young trees. However, on established trees the feeding is cosmetic — the tree has plenty of leaf area to support photosynthesis even with moderate caterpillar pressure. Most growers consider them a welcome presence rather than a pest.
What to do: Nothing, for established trees. For very young seedlings (first year), remove caterpillars by hand if you see significant defoliation. Planting pawpaw also supports a native butterfly species with a specialized relationship — one of the ecological benefits of growing this tree.
A small moth whose larvae bore into pawpaw flower buds and young fruit. The larvae tunnel into the peduncle (fruit stem) or into the developing fruit itself, causing premature fruit drop. This is the most economically significant pawpaw pest in production settings.
What to do: Collect and destroy fallen fruit early in the season to break the life cycle. In severe infestations, targeted application of kaolin clay or Bacillus thuringiensis (Bt) during bloom can reduce damage. For most small orchards the losses are tolerable without intervention.
Mature pawpaw foliage contains enough acetogenins to make it unpalatable to deer. However, very young seedlings — especially in their first year — haven't yet built up sufficient concentrations to deter browsing. Deer will eat first-year shoots, sometimes killing them to the ground.
What to do: Tree tubes or wire cages are essential for the first two years in any area with deer pressure. After year two, most trees are large enough and sufficiently defended by their own chemistry to need no protection.
Occasional white powdery patches on leaves, typically in late summer during warm days and cool nights. Cosmetic in most cases — it doesn't significantly harm established trees. Improve airflow by pruning to open the canopy if it appears regularly.
Ripe and overripe pawpaw fruit is susceptible to rapid fungal breakdown, especially in wet late-summer conditions. Fruit left on the tree past peak ripeness or that falls and lies on wet ground can develop rot quickly.
What to do: Harvest promptly when ripe. Don't leave fruit on the tree past its window. Pick up fallen fruit. On wet sites, ensure adequate drainage around trees to reduce overall soil moisture and fungal pressure.
Standing water or chronically wet soil at the root zone encourages root rot pathogens. Symptoms: yellowing leaves, general decline, bark darkening at the soil line. Most common on heavy clay soils without drainage amendment.
What to do: The fix is drainage, not fungicide. Improve drainage before planting. If existing trees show symptoms, pull back mulch from the trunk, allow the area to dry, and consider raised planting or drainage tile.
Pawpaw's natural pest resistance makes it one of the most practical fruit trees for a low-input orchard. Start with quality seeds from our Pennsylvania farm.
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