Landcare Management Advisory Committee — Portland, ME
Date: 2025-04-16
Time: 10:30

City of Portland
LMAC Waiver Committee

Wednesday, April 16, 2025 at 10:30 AM The LMAC
Waiver Committee will conduct this meeting remotely via
Zoom. Allow your computer to install the free Zoom app to
get the best meeting experience. If you are not able to attend
live either in person or via Zoom, a recording will be available
in the Agenda Center following the meeting.

https://portlandmaine-
gov.zoom.us/j/84402983768?pwd=8OfvMb7uVkYaJoRNZU
Lg7u5YI6CZhL.1




 Waiver Committee Deliberation and Decision Regarding Application To Apply Pesticides
1.
 at 690 Seashore Avenue
 a. Application materials
2. Adjournment




 1

City of Portland
LMAC Waiver Committee

Wednesday, April 16, 2025 at 10:30 AM The LMAC
Waiver Committee will conduct this meeting remotely via
Zoom. Allow your computer to install the free Zoom app to
get the best meeting experience. If you are not able to attend
live either in person or via Zoom, a recording will be available
in the Agenda Center following the meeting.

https://portlandmaine-
gov.zoom.us/j/84402983768?pwd=8OfvMb7uVkYaJoRNZU
Lg7u5YI6CZhL.1




 Waiver Committee Deliberation and Decision Regarding Application To Apply Pesticides
1.
 at 690 Seashore Avenue
 a. Application materials
2. Adjournment




 1

 Page 1
 LANDCARE ORDINANCE WAIVER APPLICATION
 Landcare Management Advisory Committee (LMAC)

APPLICANT INFORMATION

Applicant Name: ______________________________________________________________
 Parterre Ecological (Shana Hostetter)


Address: ____________________________________________________________________
 14 Braintree Street, Portland, ME 04103


Email Address: _______________________________________________________________
 shostetter@parterregarden.com


Telephone Number: __________________________________________
 717-587-5355


Submission Date: ___________________________________________
 1/27/25


I am a: ☐ Resident ☐ Landlord ☐ Business ☐ Municipality ☐ Landscape company

Are you a licensed commercial applicator? ☐ Yes ☐ No


REASON FOR REQUESTING THE USE OF A PROHIBITED FERTILIZER OR PESTICIDE:
☐ Is an emergency and threatens the public health and safety
☐ For the control of invasive plants that pose a threat to the environment (For a list of Maine Invasive
Plants visit: http://www.maine.gov/dacf/mnap/features/invasive_plants/invsheets.htm)
☐ Required to protect buildings or structures from damage
☐ Using a synthetic fertilizer on performance turf or for new development, with one or more the following
conditions:
 I. The soil temperature is less than 55 degrees Fahrenheit and reasonable grounds exist to justify
 fertilizer use at that location and at that time;
  II. The turf is experiencing high stress due to high use and must be ready for high performance play
 when the sports season(s) begin; or
 III. A suitable organic product that meets the nutrient needs of the soil as specified in a soil test is
 unavailable.

Making the right pest identification is important and can be difficult. Resources for pest identification are
available at: http://www.maine.gov/dacf/php/gotpests/invasive-pests.htm. NOTE: Applications for
poisonous plants such as poison ivy, pests of significant health importance such as ticks and mosquitos,
and destructive pests such as carpenter ants and termites are exempted under the ordinance. No waiver
is necessary to address these pests.


Please provide a detailed account of the problem you would like to address with the proposed
fertilizer or pesticide application. Include photos of the problem/pest and of the extent of the
problem (this may be number of pests or area covered):
_______________________________________________________________________
 We would like to use Garlon 3A and Round Up Custom in cut and dab or foliar foam applications. We would like to manage a large swath

____________________________________________________________________________________
 of Japnese Knotweed growing in a monoculture, including over a septic field. We would also like to manage out Bush Honeysuckle,

____________________________________________________________________________________
Multiflora Rose, and Bittersweet. The location of this property is on Peak's Island. We would also like to work within the Right of Way outlined in yellow

____________________________________________________________________________________
 on  the attached  map.




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What steps did you take to evaluate alternative methods to the proposed fertilizer or pesticide
application, including but not limited to, non-fertilizer/pesticide management tactics, minimum
risk fertilizers or pesticides, non-synthetic fertilizers or pesticides, and selecting the minimum
amount of the least toxic, most effective fertilizer or pesticide necessary.
____________________________________________________________________________________
 There is no non toxic way to successfully manage out Japanese Knotweed, especially at this scale. In our experience, repeated mowing will not ever

____________________________________________________________________________________
 eradicate the plant. It is especially important to remove this plant successfully for the sake of the building infrastructure and the septic field.

____________________________________________________________________________________
____________________________________________________________________________________


PROJECT INFORMATION
What are you treating? ☐ Turf ☐ Shrubs ☐ Trees ☐ Invasive Weeds

Address of proposed application: _________________________________________________________
 690 Seashore Ave. Peaks Island, Portland, ME


Please attach a map of the proposed application area (this may be a sketch, however it should be to
scale and include property boundaries, structures, and water bodies).

Is this application within 75ft. of a waterbody? ☐ Yes ☐ No

Proposed fertilizer or pesticide:
___________________________________________________________________
Round Up Custom, Garlon 3A


Amount to be applied: __________________________________________________________________
 360 oz over several years


Method of application: ☐ Liquid ☐ Granular ☐ Injection/systemic ☐ Cut stem treatment

Proposed timing(s)/frequency of use: ______________________________________________________
 Late Summer 2025, Late Summer 2026, Late Summer 2027


Proposed date of application: ___________________________________________________________
 First Application would be in September of 2025




Please provide a detailed management plan for your proposed application, including how you will
minimize the impact of this application on abutting properties and, to the maximum extent
possible, ensure that the grant of the waiver will not be detrimental to the public’s health, safety or
welfare.
NOTE: the following applications are prohibited:
 ● Broadcast applications: the spreading of pesticides over an entire area
 ● Preemptive applications: the application of pesticides as a measure against something possible,
 anticipated or feared, i.e., as a preventive or deterrent measure

____________________________________________________________________________________
When using the backpack sprayer we will be using large droplet sizes to minimize drift. We will only apply herbicide when the wind is under 15mph.

____________________________________________________________________________________
We will spray only when the ground is dry and not saturated with water. We will avoid spraying when forecast shows a threat of heavy rain. We will

____________________________________________________________________________________
not spray on rain days and will cease spray operations if rain is in the immediate forecast. We will cut the Knotweed and woody invasives down the the

____________________________________________________________________________________
ground in the early summer. Then we will apply herbicide in the fall when the plant is most susceptible to herbicide and is at a short height so that we

____________________________________________________________________________________
can spray low to the ground to minimize drift.




 In order for the waiver to be considered, all of the fields above must be completed. For questions, please
 contact Troy Moon in the Sustainability Office at 207-756-8362.

Completed forms may be emailed to landcare@portlandmaine.gov, or mailed or delivered to City Hall, 389
 Congress Street, Portland, ME 04101.




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LAND MANAGEMENT PLAN
A NARRATIVE FOR INVASIVE MANAGEMENT & NATIVE PLANT RESTORATION




LANDSMAN PROPERTY • PEAKS ISLAND, PORTLAND, MAINE




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 CONTENTS
 4 Introduction

 6 Existing Conditions: Invasive Plant Species

 8 Invasive Plant Management Techniques

 10 Proposed Management per Invasive Species

 14 Management Calendar for Treatment and Planting

 15 Proposed Schedule for the Landsman Residence

 16 Preliminary Planting Proposal by Matthew Cunningham Landscape Design (MCLD)




A view of the Landsman residence and the vegetation behind the home. The orange vegetation shows a Knotweed monoculture that
extends beyond the property boundary.




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PROJECT INTRODUCTION PROJECT GOALS
 The Landsman property is on the Eastern side of Peaks Island, Maine. The property abuts Wharf Cove in the
 Atlantic Ocean to the East, large natural areas to the West, and several residential properties to the North and
This plan addresses proposed invasive management and South. Little more than invasive plant varieties and a few nonnative ornamental plants comprise the property’s
contains a native restoration narrative at the Landsman
 0 0.5 km vegetation as the invasive species dominate the native ecosystems that are present. This Land Management
property on Peaks Island, Portland, Maine. The oceanfront
property sits on the East side of the Island spanning just over Plan aims to present an inventory of the invasive species, share our Invasive Plant Management strategies, and
 Landsman
0.5 acres in a residential area. The property abuts large natural propose native species to replace the removed invasive plants.
 Property
areas to the West and Wharf Cove in the Atlantic Ocean to the
 Boundary
East. As a monoculture of mature Knotweed from the western
natural areas encroach on the Landsman property, little more Native plant restoration will be managed by Matthew Cunningham Landscape Design (MCLD), a team
than invasive and a few nonnative ornamental plants comprise
 specializing in native plant garden design.
the property’s vegetation. With approval from the Department
of Environmental Protection (DEP), removing invasive species
will allow Matthew Cunningham Landscape Design (MCLD)
team, specializing in native plant garden design, to manage
the restoration planting.

The invasive population on-site and on the entirety of Peaks
Island is mature and self-perpetuating. These invasive species
outcompete native trees, shrubs, and wildflowers in Peaks
Island’s natural habitats, create monoculture stands devoid Right of Way (ROW)
of biodiversity, create habitat for ticks, and reduce habitat Map the of residential parcels on Peaks Island including the
for native wildlife. These species will inevitably displace the  Landsman property boundary and the large natural area
 parcels to the West.
remnant native population of the Island and are considered
a highly invasive threat to entire ecosystems unless decisive Mature Knotweed
 Monoculture Septic
action is taken. The invasive on the Landsman property are classified as “widespread” and “severely invasive” by
the Maine Natural Areas Program (MNAP), which is within the Maine Department of Agriculture, Conservation, and
Forestry. Landsman
 Property Boundary
Significant invasive plant pressure exists on the site of highly invasive and mature Knotweed, Asiatic Bittersweet,
Shrub Honeysuckle, and Multiflora Rose. Additionally, the deep, matted root system of Knotweed poses a threat to
the septic system on-site and has prompted the interest of the property owner to work collaboratively with abutters to
help abate Knotweed growth. Action to remedy the densely invaded property boundary on the western part of the
site now could spare the rest of the property from invasion and allow MCLD to restore the property to a healthy and
biodiverse ecosystem.

This plan identifies the invasive plants we propose to remove, describes each, and details best management practices
for control and management. The plan also includes a narrative for proposed native restoration and specifying
plant species. Finally, it provides a detailed maintenance calendar for all aspects of proposed management and
ecological restoration over an extended timeline.

 0 30 ft

 An aerial view of the Landsman property shows the bright orange vegetation of a mature Knotweed monoculture encroaching from the West.
 The area of Knotweed that this plan proposes for invasive management and removal is highlighted in blue.


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EXISTING CONDITIONS: INVASIVE PLANT SPECIES
INVASIVE SPECIES PLANT KEY			

BOTANICAL NAME		 COMMON NAME
Celastrus orbiculatus		 Bittersweet
Lonicera morrowii		 Shrub Honeysuckle
Ligustrum vulgare		 Privet
Fallopia japonica		 Knotweed
Rosa multiflora			 Multiflora Rose




(Above) A bramble of Celastrus orbiculatus, Bittersweet, at the (Above) Fallopia japonica, Knotweed, is encroaching on the
front of the property. property from the West.
(Below) Mature Lonicera morrowii Shrub Honeysuckle, along the (Below) Rosa multiflora, Multiflora Rose & Lonicera japonica,
foundation of the home. Shrub Honeysuckle are intertwined.




 An aerial view of the Landsman residence. The orange vegetation shows a Knotweed monoculture that extends beyond the property
 boundary. The area that this plan proposes for invasive management and removal is highlighted in blue and includes Knotweed, Shrub
 Honeysuckle, and Bittersweet.


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INVASIVE PLANT MANAGEMENT TECHNIQUES
IMPORTANT NOTE ON HERBICIDE APPLICATIONS BY COASTLINE AREA
Because some of the areas we will treat with herbicide are adjacent to the coastline, every effort will be made to FOLIAR FOAM: CUT AND FILL:
perform these applications safely. We will prioritize manual removal where possible. We will use cut and dab herbicide
applications when working in sensitive areas. We will only work with herbicide during dry stretches of weather and on Cutting alone is not an effective tool for managing When foliar application is not an option (Knotweed
calm days to minimize drift. We will use wetland safe herbicides only (Garlon 3A and Roundup Custom). Knotweed. However, cutting can be integral to managing in sensitive areas and/or mixed with desired plants)
 this plant, particularly when combined with follow-up or for smaller patches of Knotweed stem application
 herbicide application. An adequately timed cutting is an option. For large populations, the large stems
CUT AND DAB TREATMENT: will eliminate the tall canopy and simplify follow- are cut at 18 inches. The remaining stems are then
 up operations. For more extensive mature stands of treated between the first and second nodes with a
All invasive plant species that have a base greater than 1” in caliper will be addressed with herbicide application. Knotweed, stands should be cut in May, and foliar or 50% solution of glyphosate that is put into the hollow
Invasive plants of this size usually have extensive fibrous root systems which provide beneficial soil stabilization and stem herbicide should be applied in late summer. The tube of the stem and its walls. This should be done for
are best left in situ. Unfortunately, they also maintain the ability to resprout, which is why we propose a cut and dab cutting in May causes the Knotweed to regrow to a consecutive 2-5 seasons.
method with Garlon 3A™ (a triclopyr-based herbicide) on individual cut stumps. Licensed Herbicide Applicators will more manageable height in late summer. At this point,
complete all treatments. the leaves can be easily painted with a 6.0% Aquaneat
 (glyphosate) solution before the plant pulls its nutrients
 back into the roots in preparation for winter. Cutting later
 than June reduces your operational window to chemically
 treat knotweed, and waiting too late in the season can
 result in almost no regrowth.

 After the Knotweed has been cut in early June, the plant
 will respond by utilizing stored carbohydrates, further
 reducing the plant’s vigor. The herbicides used for a
 foliar application move through the plant. To control the
 rhizomes, the application needs to be made later in the
 season, when the movement of carbohydrates is back to
 the rhizomes for growth and storage.




 Licensed applicators with required Personal Protective Equipment paint the stems of
 invasive species after cutting.




 Foliar herbicide application by licensed technician Herbicide application by licensed technician



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 Page 8 Foliar herbicide application by licensed technician
PROPOSED MANAGEMENT PER INVASIVE SPECIES SHRUB HONEYSUCKLE
 LONICERA MORROWII
ORIENTAL BITTERSWEET DESCRIPTION:
CELASTRUS ORBICULATUS DESCRIPTION:
 Celastrus orbiculatus, Asiatic
 Bittersweet is a deciduous Lonicera morrowii, Morrow’s
 climbing vine common in honeysuckles are upright, deciduous
 areas of disturbance in our shrubs that typically have a multi-stem
 New England forests. It has mounding appearance. Oval leaves are
 glossy, rounded leaves that opposite along the stem with smooth
 are alternate with finely edges (no teeth or lobes) and hairy on
 toothed margins. The leaves the underside. Mature stems are often
 turn yellow in the fall. The hollow on the interior and peeling on
 fruiting plants produce small the outer bark. In the spring pairs of
 greenish flower clusters from fragrant, tubular flowers less than an
 leaf axils that mature in fall inch long are borne along the stem
 to produce high numbers of in the leaf axils. The fruits are red to
 fruiting seed. The seed are orange, and fleshy.
 noticeably yellow, globular
 capsules that split open at HABITAT:
 maturity to reveal red-orange
 fruiting seeds. Roots are also Honeysuckles are relatively shade-
 distinctly orange. intolerant and usually colonize forest
 edges, abandoned fields, and other
 HABITAT: open, upland habitats. Grazed
 meadows and disturbed woodlands
 Bittersweet spreads easily into are especially vulnerable. Woodlands
 forest edges, woodlands, and open meadows, especially those
 unmanaged meadows and that have been grazed or otherwise
 old fields. Most disturbed sites disturbed and are left unmanaged
 that are not being actively are also highly susceptible. Morrow’s
 managed that receive full sun Honeysuckle are highly adaptable
 are susceptible. The vine can and can grow in even challenging
 tolerate shade but is often environments such as roadsides and
 found in more open, sunny wetland edges.
 areas.

 MANAGEMENT:
MANAGEMENT: Honeysuckle management can
 combine mechanical mowing
Small seedlings can be hand
 and manual hand pulling with cut
pulled, but bittersweet resprouts
 and dab herbicide treatments.
prolificate to form root fragments,
 Small specimens may be removed
so more aggressive measures must
 manually as honeysuckle root
be taken on all specimens. For
 systems are fairly shallow. Root
established plants, vines should be
 resprouting can persist for a few
cut to the ground to reduce mass
 years and several seasons of
and treated with the cut-and-dab
 management may be required to
method. Bittersweet aggressively
 fully control the population.
suckers after cutting, so it is essential
to cut and treat during or after
its flowering period (late June to
December).

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JAPANESE KNOTWEED MULTIFLORA ROSE
Fallopia japonica Rosa multiflora

 DESCRIPTION: DESCRIPTION:
 Knotweed, Fallopia japonica, is Rosa multiflora, Multiflora
 a tall-growing, hollow-stemmed, Rose is a shrub with
 perennial plant that can grow to arching canes and a
 over 10 feet in height. Stems of mounding shape in the
 Japanese knotweed are smooth, landscape. The leaves are
 stout and swollen at joints where divided into five to eleven
 the leaf meets the stem. Although sharply toothed leaflets.
 leaf size may vary, they are The base of each leaf
 normally about 6 inches long by stalk has a pair of fringed
 3 to 4 inches wide on a mature bracts, which is a key
 plant, broadly oval to somewhat identifier of the plant from
 triangular and pointed at the tip. other wild roses. Beginning
 The greenish-white flowers occur in early summer, clusters
 as branched sprays in summer
HABITAT: and are followed soon after by
 of showy white flowers
 appear. The flowers are
 small winged fruits. Seeds are followed by developing
that forms dense monocultures
 triangular, shiny, and very small, red fruit, or hips, during the
on various site conditions, from
 about 1/10 inch long. summer that remain on the
roadsides to stream banks.
Knotweed is a relative of plant through the winter.
buckwheat, smartweed, and
the Noxious Weed mile-a- HABITAT:
minute vine. Japanese knotweed
was introduced to the U.S. as Multiflora Rose thrives in early
ornamentals during the late successional habitat. The
1800s. However, it has become rose has a wide tolerance for
an invasive plant in our natural various soil, moisture, and light
areas due to its imposing height, conditions. It occurs in dense
dense growth habit, aggressive woods, along river banks
spread, and seeming indifference and roadsides and in open
to control methods. unmanaged fields. It can form a
 dense understory that suppresses
 growth of native plant species.
 MANAGEMENT: The seed is readily dispersed
 by birds, and the extended
 Knotweed management can productivity of the fruit into winter
 combine foliar spray and cut-and-fill months allows widespread
 herbicide treatments. Precisely timed distribution of the plant.
 cuttings of Knotweed increase the
 operational window to chemically MANAGEMENT:
 treat. Either of these treatments
 should be done for consecutive 2-5 Manual methods of hand-pulling seedlings
 seasons. is effective. For more established shrubs,
 a combination of pruning to reduce mass
 followed by cut & dab treatments with a
 triclopyr-based herbicide is recommended.
 Persistent root infestations may require repeat
 cutting over several seasons. Rake any seeds
 present, bagging and disposing of correctly.


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 690 SEASHORE AVENUE 690 SEASHORE AVENUE
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MANAGEMENT CALENDAR FOR TREATMENT & PLANTING PROPOSED MANAGEMENT AND MAINTENANCE SCHEDULE

 LATE SPRING/ EARLY SUMMER 2025 (WITH DEP APPROVAL)
 TASK JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
 » Systematically remove woody invasive plants according to priority.
 Hand removal woody seedlings < 1” caliper
 » Cut and remove all Japanese Knotweed
 Hand pulling herbaceous species
 LATE SUMMER/FALL 2025
 Mechanical management of woody invasive » Treat Japanese Knotweed reprouts with herbicide (foliar treatment of foam).

 » Treat woody plant reprouts with herbicide (foliar treatment of foam).
 Cut and dab herbicide on woody invasive
 » If the invasive plant management schedule holds, it is possible to plant larger trees and shrubs into the disturbed areas in the late fall of
 2025. However, due to the intense nature of the Knotweed monoculture, we would recommend waiting until the following year to plant.
 Japanese Knotweed Cutback
 2026
 Japanese Knotweed Chemical Treatment
 » Continue the same pattern as the 2025 season.

 2027

 » Assess the effectiveness of the management in the past 2 years.




 Optimal timing and efficiency


 Not optimal but mostly effective


 Possible, but not ideal




The timing of various containment and restoration strategies is critical to their success. Fortunately, the calender provides ample opportunity for action at any
time of the year. Tasks should be performed by trained ecological technicians and licensed herbicide applicators. These recommendations for restoration take
into consideration the long term health of the East Point Audubon Sanctuary. Once invasive plants have been managed in a particular area, the restoration of
native species should begin.


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