Time in Knox County:

2019 Summer Office Hours
Mon, Tue, Thu, Fri: 8:30 am - 4:30pm (mostly)
Wed: 9:00am - 2:30pm

* We try hard to be in the office between 8:30am and 4:30pm on Mon, Tue, Thu, & Fri, but please call ahead to be sure!

893 West St (Rt 90)
Rockport, ME 04856


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    Plants Unlimited

    Flatbread Co.

    Fireside Pottery

    Fresh Off The Farm

    Green Thumb

    Hatchet Cove Farm

    Midcoast Conservancy

    Mid-Maine Forestry

    Mystic Woodworks

    Savage Oakes Vineyard

    Schoolhouse Farm

    Spear Farm (Nobleboro)

    State of Maine Cheese

    Union Fair Society

    Warren True Value

    Plant Sale Online Catalog

    Plant Care


    These include Extension Fact Sheets on care of fruits and vegetables, trees and shrubs, and detailed profiles of many of the native woody plants on our list.

    There is also information about buffer plantings, meadow establishment, composting - lots of stuff!

    Plant hardiness: Maine Plant Hardiness Map 

    • All plants on our list are hardy to at least Zone 5 and most are hardy to Zone 4 and below
    • USDA Plant Hardiness Zones: Average Annual Minimum Temperature (F)Z4: -20 to -30; Z5: -10 to -20; Z6: -10 to 0; Z7: 0 to 10.
    • Plant hardiness zone boundaries have changed. Click here for the latest Maine Plant Hardiness Map; for an interactive map go to http://planthardiness.ars.usda.gov.

    Basic care for bareroot trees and shrubs

    Detailed fact sheet: Plant Care 

    • Planting within 48 hours
      Keep plants in plastic bag and moisten packing material; store in a cool, dark place. Soak roots in water (several hours to overnight) while you dig holes.
    • Planting between 2 days and a week
      Pack plants tightly in moist mulch, sawdust, shreddded newspaper; compress to remove air pockets and keep well-watered in cool, dark spot until ready to plant.
    • To hold plants for a longer time
      1) Pot up your plants in a good potting soil/compost mix; or
      2) Dig a trench and cover plant roots with soil (heel in); keep well-watered till ready to plant. (This can be dangerous and result in a strange looking border a few years down the road!)

    Plant Chart: Cultural Conditions and Landscape Uses

    Click HERE for printable plant chart in color.

                 Light     Full sun: xx   Pt sun: x   Pt shade: x    Shade: xx                                     

    Soil moisture     Moist: x   Wet: xx   Dry: x    Drought tolerant: T

    Virtually all of the perennials and herbs attract butterflies, native bees, other pollinators, and beneficial insects. Written descriptions of some species indicate that they are larval hosts for butterflies.