POP TIPS: Black Knot on Cherry and Plum Trees

Black Knot identification, symptoms, and life cycle Sometimes, in the springtime, cherry and plum trees may develop subtle, velvety olive-green swellings on their branches or twigs. If left unattended, these swellings turn into large, brittle, unsightly black galls that can kill the whole limb or even stunt the growth of the entire tree. These galls … Continue reading POP TIPS: Black Knot on Cherry and Plum Trees

Supporting Threatened Pollinator Habitats & Introducing our Swarthmore Student Researcher Team

We here at POP are excited to share that we have been paired with 4 student researchers from Swarthmore College, who will be working with us over 8 weeks through POP’s School Orchard Program to create educational materials around building habitat for threatened pollinator species. Over the course of these 8 weeks, students will have … Continue reading Supporting Threatened Pollinator Habitats & Introducing our Swarthmore Student Researcher Team

Mason Bees: Philly’s Friendly Pollinators

You’ve probably heard the buzz about honeybees and how important they are to agriculture, but did you know that native bees such as mason bees are even better and more efficient pollinators of native crops? In fact, the species Osmia lignaria (pictured above) has been named the blue orchard bee for its recognized usefulness in … Continue reading Mason Bees: Philly’s Friendly Pollinators

PLANT SPOTLIGHT: Persimmon (Diospyros)

 PERSIMMON TREE FACTS Asian Persimmon (Diospyros kaki) is native to China, where it has been cultivated for centuries.  Korea and Japan have also been centers of its cultivation, and it was introduced to California in the mid 1800’s. Asian Persimmons usually grow between 13-20 ft tall and wide and are self-fertile.  At our community orchards, … Continue reading PLANT SPOTLIGHT: Persimmon (Diospyros)

Honoring Roseann McLaughlin and GrowAbility Honeybee Sensory Lesson Book (PDF Download)

It’s with deep sadness that we at the Philadelphia Orchard Project offer our heartfelt condolences to the family, friends, and community of Roseann McLaughlin of Overbrook School for the Blind, who passed November 2, 2018 in a tragic house fire. Roseann was the enthusiastic and loving cornerstone of the school’s Farm-To-Table program begun in 2013, … Continue reading Honoring Roseann McLaughlin and GrowAbility Honeybee Sensory Lesson Book (PDF Download)

PLANT SPOTLIGHT: Black Walnut (Juglans nigra)

Black Walnut (Juglans nigra) Tree Facts Black Walnut  (Juglans Nigra) is a perennial, stone fruit tree native to Eastern North America, commonly found in riparian zones (area between water and land).  Technically the walnut produces a fruit called a “drupe” and is not a true nut! The drupes are harvested in the fall, dehulled and … Continue reading PLANT SPOTLIGHT: Black Walnut (Juglans nigra)

Aphids and Fruit Trees

Aphids are a common pest an a wide variety of fruit trees, shrubs, vines, vegetables, and more! Leaves curled end to end are the most common sign of aphid damage.  Ants in your tree are another sure sign of aphid infestation, as their only interest in climbing trees is to harvest honeydew (sweet aphid droppings).  … Continue reading Aphids and Fruit Trees

Fig winter die-back and spring pruning

After a rough winter with some single digit temperatures, we’re very pleased to see most of the figs in the city sprouting new growth!  The amount of winter damage has been very variable from site to site and even one tree to another.  Some are sprouting high on the tree: ​ Some are only sprouting from … Continue reading Fig winter die-back and spring pruning

Beetle Invasion! Coping with Japanese Beetles

What green, Japanese terror costs more than 200 million dollars in damage each year? No, it’s not Godzilla…it’s Popillia japonica a.k.a, the Japanese beetle (JB)! This tiny import has entrenched itself as one of the most notorious garden and orchard pests in the United States, devouring acres of fields, trees, and shrubs each year. Grower … Continue reading Beetle Invasion! Coping with Japanese Beetles

The Spotted Lanternfly: New Orchard Superpest?

Have you heard about the Spotted Lanternfly yet? If you haven’t, you’ll probably hear about them a lot more in the near future! First seen in Southeastern PA in 2014, this pest insect’s population has exploded and since moved into New York, Delaware, and Virginia. The Spotted Lanternfly is a threat to many orchard crops … Continue reading The Spotted Lanternfly: New Orchard Superpest?