North America Native Plant

Sharp’s Mock Orange

Botanical name: Philadelphus sharpianus

USDA symbol: PHSH

Life cycle: perennial

Habit: shrub

Native status: Native to the lower 48 states  

Synonyms: Philadelphus sharpianus Hu var. parviflorus (PHSHP)   

Sharp’s Mock Orange: A Rare Native Treasure for Southern Gardens If you’re passionate about native plants and love discovering hidden gems, Sharp’s mock orange (Philadelphus sharpianus) might just capture your gardening heart. This lesser-known member of the mock orange family is a true American native with a story worth telling ...

Rare plant alert!

Region: Conservation status by state

Status: S1S3Q: Status is uncertain but is somewhere between the following rankings: Uncertain taxonomy: ⚘ Critically Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 5 or fewer occurrences or very few remaining individuals (<1,000) ⚘ Vulnerable: Either very rare and local throughout its range, found only in a restricted range (even if abundant at some locations), or factors are making it vulnerable to extinction. Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals ⚘

Sharp’s Mock Orange: A Rare Native Treasure for Southern Gardens

If you’re passionate about native plants and love discovering hidden gems, Sharp’s mock orange (Philadelphus sharpianus) might just capture your gardening heart. This lesser-known member of the mock orange family is a true American native with a story worth telling – and a conservation status that makes it extra special.

What Makes Sharp’s Mock Orange Special?

Sharp’s mock orange is a perennial shrub that calls the southeastern United States home. Unlike its more common cousins that you might find at every garden center, this particular species has a very limited natural range and a personality all its own.

As a multi-stemmed woody plant, this shrub typically stays under 13-16 feet tall, making it a manageable choice for most garden spaces. Its several stems arise from or near the ground, creating that classic shrubby appearance that works beautifully in naturalistic landscapes.

Where Does Sharp’s Mock Orange Call Home?

This native beauty has quite an exclusive address – you’ll only find it naturally growing in Arkansas and Tennessee. That’s it! This limited geographic distribution makes it a true regional specialty and adds to its appeal for native plant enthusiasts in these areas.

The Rarity Factor: Why This Matters

Here’s where things get really interesting (and important). Sharp’s mock orange has a Global Conservation Status of S1S3Q, which indicates it’s considered rare and potentially vulnerable. This isn’t necessarily bad news, but it does mean we need to be thoughtful gardeners if we want to grow this plant.

If you’re smitten with the idea of growing Sharp’s mock orange, that’s wonderful! Just make sure you’re getting your plants from reputable sources that practice responsible propagation. Never collect from wild populations – let’s keep those natural stands healthy and thriving.

Should You Plant Sharp’s Mock Orange?

The short answer? If you live in Arkansas or Tennessee and can source it responsibly, absolutely! Here’s why:

  • It’s a true native that belongs in your regional ecosystem
  • You’ll be growing something genuinely rare and special
  • It supports local biodiversity as part of its native plant community
  • It’s likely well-adapted to your local climate conditions

However, because detailed growing information for this specific species is limited, you might want to start with its better-known relatives if you’re new to mock oranges. Consider this plant for when you’re ready to take on a more challenging native gardening project.

Growing Sharp’s Mock Orange: What We Know

Here’s where I have to be honest with you – specific growing information for Philadelphus sharpianus is quite limited in the literature. This is partly because of its rarity and partly because it hasn’t been widely studied or cultivated.

What we can reasonably assume, based on its native habitat in Arkansas and Tennessee, is that it likely prefers:

  • Moderate moisture levels (not too wet, not too dry)
  • Well-draining soil
  • Partial to full sun exposure
  • USDA hardiness zones typical for its native range (likely zones 6-8)

If you decide to grow this plant, your best bet is to mimic the conditions where it naturally thrives. Think woodland edges, natural clearings, and areas with good air circulation.

The Bottom Line

Sharp’s mock orange represents something special in the native plant world – a rare, regionally specific shrub that connects us to the unique biodiversity of Arkansas and Tennessee. While it may not be the easiest plant to find or grow, that’s part of what makes it so rewarding.

If you’re an experienced native plant gardener in the Southeast looking for your next challenge, and you can source it responsibly, Sharp’s mock orange could be a wonderful addition to your collection. Just remember to respect its rarity and always choose conservation-minded sources.

For beginners or gardeners outside its native range, consider starting with other native mock orange species that might be more readily available and better documented. Every native plant in your garden is a win for local ecosystems!

Sharp’s Mock Orange

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Rosales

Family

Hydrangeaceae Dumort. - Hydrangea family

Genus

Philadelphus L. - mock orange

Species

Philadelphus sharpianus Hu - Sharp's mock orange

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA