Delaware Department of

Nursery Inspection

ornamental trees and shrubs at a nurseryPlant Industries inspectors look for insect and plant disease pests on nursery stock. The Delaware Department of Agriculture’s Nursery section is responsible for the administration of the Delaware Nursery Law (Title 3 Chapter 13 – Nurseries and Nursery Stock Law). Delaware law defines nursery stock as “any plant for planting, propagation, or ornamentation, including, but not limited to:

a. All plants, trees, shrubs, vines, perennials grafts, cuttings and buds that may be sold for propagation, whether cultivated or wild, and all viable parts of these plants.

b. Any other plant or plant part, including cut Christmas trees or any non-hardy plant or plant part, including but not limited to, annuals, bedding plants and vegetable plants.”

In addition, the Nursery section issues certificates of inspection, phytosanitary certificates, and Nursery Licenses to businesses engaged in a nursery or nursery-related business within the state. Certification and inspections are conducted to prevent the introduction of unwanted plant pests into Delaware, and likewise, to facilitate grower shipments of nursery stock to other states and countries.


Nursery License

Anyone who is directly engaged with the distribution of plants, plant products, plant material, nursery stock, or horticultural products is required to let the Delaware Department of Agriculture know that they are conducting this business. They must obtain a nursery industry license prior to starting business operations. The nursery industry licenses are valid for one year (January 1 – December 31) and must be renewed annually.

Citizens wishing to search for a nursery in their county may utilize this online directory:


Invasive Plants

The Invasive Plants Law went into effect on July 1, 2022, prohibiting any person from importing, exporting, buying, selling, transporting, distributing, or propagating any viable portion, including seeds, of an invasive plant in Delaware. An invasive plant includes any living part, cultivar, species, or subspecies not native to Delaware that has the potential to result in widespread dispersal and establishment; out-compete other species in the same area; exhibit rapid growth or high seed or propagule productions; or become established in natural areas in the State.

If an individual or group is interested in obtaining an exemption for a cultivar from the Invasive Plant List, the Petition to Exempt Cultivar NEW! must be completed and submitted for review.

Updated 806 Regulations for Invasive Plants, including the Final Invasive Plant List in the Invasive Species Law, was published in Vol. 26, Issue 3, Thursday, September 1, 2022:
(asterisk indicates potentially sold in the nursery trade.)

  • Amur honeysuckle, Lonicera maackii
  • Autumn olive, Elaeagnus umbellata
  • Callery pear, Pyrus calleryana*
  • Chinese wisteria, Wisteria sinensis*
  • Creeping water primrose, Ludwigia peploides subsp. glabrescens*
  • English ivy, Hedera helix*
  • European privet, Ligustrum vulgare*
  • European reed, Phragmites australis subsp. australis
  • European sweetflag, Acorus calamus
  • Garlic mustard, Alliaria petiolata
  • Hydrilla, Hydrilla verticillata
  • Japanese barberry, Berberis thunbergii*
  • Japanese honeysuckle, Lonicera japonica
  • Japanese knotweed, Fallopia japonica
  • Japanese pachysandra, Pachysandra terminalis*
  • Japanese stiltgrass, Microstegium vimineum
  • Lesser celandine, Ficaria verna
  • Lesser periwinkle, Vinca minor*
  • Marsh dewflower, Murdannia keisak
  • Mile-a-minute weed, Persicaria perfoliata
  • Morrow’s honeysuckle, Lonicera morrowii
  • Multiflora rose, Rosa multiflora
  • Norway maple, Acer platanoides*
  • Orange daylily, Hemerocallis fulva*
  • Oriental bittersweet, Celastrus orbiculatus
  • Parrot-feather, Myriophyllum aquaticum*
  • Porcelain berry, Ampelopsis glandulosa
  • Purple loosestrife, Lythrum salicaria
  • Spotted knapweed, Centaurea stoebe micranthos
  • Tatarian honeysuckle, Lonicera tatarica
  • Tree of heaven, Ailanthus altissima
  • Water hyacinth, Eichhornia crassipes*
  • Wineberry, Rubus phoenicolasius
  • Winged euonymus, Euonymus alatus*
  • Yam-leaved clematis, Clematis terniflora
  • Yellow flag iris, Iris pseudoacorus*


Plant Watch List

Plants listed on the Plant Watch List must be identified with a tag, label, or sign on each plant or in the general vicinity of the plants for sale. (Effective August 15, 2022)

  • Creeping Jenny, Lysimachia nummularia

Resources and Signage for Nursery Use


  • Sign (7” x 5” inches) for online use (.png, 176MB)
  • Sign (7” x 5” inches) for printing (.pdf, 2 MB) – Standard Printing, in-house
  • Sign (7” x 5” inches) for printing (.pdf, 2 MB) – Crop Mark and Bleeds



Delaware Ribes Permit Application


Plant Industries Nursery Staff

  • Jeff Brothers, Environmental Program Manager, Send E-Mail
  • Rebecca Gartley, Environmental Scientist, Send E-Mail

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