This plant should not be confused with Chelidonium majus, Greater Celandine a Eurasian invasive biennial. The leaves and flowers of the two can be very difficult to distinguish, but they are very different in the seeding stage; Chelidonium has a long, hairless "legume" look, while Stylophorum's fuzzy pods (photos above) are unmistakable.
*This species may be difficult and/or slow to germinate and grow to maturity. Please note the germination code. Seed of this species is kept under refrigeration (33-38 F) in our warehouse. The days in transit to you in colder or warmer conditions won’t harm the seed, but it should be put back in refrigeration until you are ready to plant or apply pre-sowing treatment.
| Live Plant Shipping Table | |||
| Spring | Fall | Age/Size | |
| Dormant Bare Roots |
April/May | October | 3 years |
| Potted 3-Packs | N/A | September | 2.5" wide x 3.5" deep pots |
| Potted Trays of 50 | April/May | N/A | 2" wide x 5" deep plugs |
Map Key
This map shows the native and introduced (adventive) range of this species. Given appropriate habitat and climate, native plants can be grown outside their range.
3 Questions asked on Stylophorum diphyllum
It’s a complicated question and you’ll get different answers depending on who you talk to. Generally speaking, planting a North American native plant is better than planting an Asian or European plant even if that North American plant was only ever found two states away. If you are adjacent to natural areas, particularly natural areas in good condition, sticking with natives of your area is more important than if you’re in a concrete jungle or deep in suburbia. Plants native to your eco-region should perform the best and have the most benefits for local pollinators. How pure you decide to be with natives is up to you!
Seed
Growing your own plants from seed is the most economical way to add natives to your home. Before you get started, one of the most important things to know about the seeds of wild plants is that many have built-in dormancy mechanisms that prevent the seed from germinating. In nature, this prevents a population of plants from germinating all at once, before killing frosts, or in times of drought. To propagate native plants, a gardener must break this dormancy before seed will grow.
Each species is different, so be sure to check the GERMINATION CODE listed on the website, in the catalog, or on your seed packet. Then, follow the GERMINATION INSTRUCTIONS prior to planting. Some species don't need any pre-treatment to germinate, but some species have dormancy mechanisms that must be broken before the seed will germinate. Some dormancy can be broken in a few minutes, but some species take months or even years.
Seed dormancy can be broken artificially by prolonged refrigeration of damp seed in the process of cold/moist STRATIFICATION. A less complicated approach is to let nature handle the stratifying through a dormant seeding, sowing seeds on the surface of a weed-free site in late fall or winter. Tucked safely beneath the snow, seeds will be conditioned by weathering to make germination possible in subsequent growing seasons.
To learn more, read our BLOG: How to Germinate Native Seeds
Dormant Bare Root Plants
We dig plants when they are dormant from our outdoor beds and ship them April-May and October. Some species go dormant in the summer and we can ship them July/August. We are among the few still employing this production method, which is labor intensive but plant-friendly. They arrive to you dormant, with little to no top-growth (bare-root), packed in peat moss. They should be planted as soon as possible. Unlike greenhouse-grown plants, bare-root plants can be planted during cold weather or anytime the soil is not frozen. A root photo is included with each species to illustrate the optimal depth and orientation. Planting instructions/care are also included with each order.
Download: Installing Your Bare-Root Plants
Potted Plants
3-packs and trays of 32, 38, or 50 plants leave our Midwest greenhouses based on species readiness (being well-rooted for transit) and order date; Spring shipping is typically early May through June, and Fall shipping is mid-August through September. Potted 3-packs and trays of 38 plugs are started from seed in the winter so are typically 3-4 months old when they ship. Trays of 32/50 plugs are usually overwintered so are 1 year old. Plant tray cells are approximately 2” wide x 5” deep in the trays of 38 and 50, and 2.5" wide x 3.5" deep in the 3-packs and trays of 32; ideal for deep-rooted natives. Full-color tags and planting & care instructions are included with each order.
Download: Planting and Care of Potted Plants
Shipping & Handling Charges
SEED$100.00 and under: $5.00over $100.00: 5% of the total seed cost
BARE ROOT PLANTS$50.00 and under: $7.50
over $50.00: 15% of the total plant cost
*MN State Sales Tax of 7.375% is applied for orders shipping to Minnesota only. Shipping & Handling Charges are also subject to the sales tax.
Shipping Season
SEED, TOOLS and BOOKS are sent year-round. Most orders ship within a day or two upon receipt.
BARE ROOT PLANTS are shipped during optimal transplanting time: Spring (April-May) and Fall (Oct). Some ephemeral species are also available for summer shipping. Since our plants are field-grown, Nature sets the schedule each year as to when our season will begin and end. We fill all orders, on a first-come, first-serve basis, to the best of our ability depending on weather conditions beyond our control.
*We are unable to ship PLANTS outside the contiguous US or to California due to regulations.
Delivery
We ship using USPS, UPS and Spee Dee. UPS and Spee Dee are often used for expediting plant orders; they will not deliver to Post Office Box numbers, so please also include your street address if ordering plants.
FOR MORE DETAILED SHIPPING INFORMATION, INCLUDING CANADA SHIPPING RATES (SEED ONLY), PLEASE SEE 'SHIPPING' AT THE FOOTER OF THIS WEBSITE.
