Download garden weeds 2012 - Reston Association

GARDEN WEEDS
2012
Molly O’Boyle
Reston Association, All Gardeners Meeting
February 25, 2012
Molly’s Mantra
A Weed is a Wildflower
Growing in the Wrong Place
Types of Garden Weeds
ANNUAL
•SUMMER
•WINTER
PERENNIAL
BIENNIAL
Bermuda/Witch Grass –
Cynodon dactylon
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Perennial Grass
Propagates at the nodes and through flowers
Has rhizomes and stolons for roots; potentially grows 6+ inches deep in soil
Difficult to eradicate; can form an impenetrable mat
• Do NOT toss in compost pile!! Please bag and throw in trash!!
Ground Ivy - Glechoma hederacea
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Perennial with creeping stems that root at the nodes and foliage that emits a
mint-like odor when mowed
Rhizomes occur and fibrous roots are also produced at the base at each node
of the trailing stem.
Easily eradicated by hand pulling, make sure to remove all roots
Morning Glories - Ipomoea hederacea
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Summer annual, twining or climbing vine with heart-shaped leaves
Can climb up to 10’ tall
Taproot
VERY easily eradicated early – identify the plant, easily removed when just a few
cotyledons/leaves are present
Spread by seeds once the flower pod has dried; will easily pop off the vine once they
are formed
Bulbous Buttercup –
Ranunculus bulbosus
• Low-growing perennial with divided leaves and distinctive yellow flowers
• Flowers are erect, from 8 to 24 inches in height
• The base of the plant is thickened into a structure known as a corm, which
resembles a bulb.
Plantain - Plantago major
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Perennial weed
Taproot with fibrous roots
Cotyledons are spatula-shaped and joined at the base
Flowers on a narrow stalk
Hairy Bittercress - Cardamine hirsuta
• Most often a summer annual but occasionally a winter annual weed
• Silique, a narrow capsule with many seeds, explosively spread the seed as
much as 10 feet from the parent plant
• Has a taproot
Common Chickweed - Stellaria media
• Prostrate winter annual
• Usually running prostrate along the ground, rooting at the nodes,
with the upper portion erect or ascending and freely branching
• Flowers are small
• Shallow, fibrous root system
• Easily removed
Pokeweed - Phytolacca americana
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Large perennial weed, 3-10’ tall
Reddish-purple branched stems and dark purple to black berries-poisonous
Large, white tap root up to 6 inches in diameter – hand pull when young
Spread by wildlife
White Clover - Trifolium repens
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Perennial with trifoliate leaves
Stems that root at the nodes
White flowers on short stems
Difficult to fully eradicate
Queen’s Anne Lace/Wild Carrot Daucus carota
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Biennial weed; closely resembles a typical garden carrot during the first year of growth.
During the second year of growth, the plants produce tall stalks with white, flat-topped
flowers.
Many white flowers occur in a cluster where the stalks of each flower (pedicels) all arise
from a common point (an umbel). However, this gives the appearance of a single, flattopped white flower.
Slightly thickened taproot.
Palmer Amaranth - Amaranthus palmeri
• An erect summer annual that may reach 6 1/2 feet in height
• Taproot that is often, but not always, reddish in color
• Single seeded utricle that reaches 2 mm in length and are wrinkled when
dry. Each utricle splits open in the middle to expose a single glossy black
to dark brown seed
Henbit- Lamium amplexicaule
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Winter annual or sometimes biennial broadleaf plant
Square stems and pink-purple flowers, reaching 16 inches in height
Mint Family
Spreads only by seed
Dandelion, Taraxacum officinale
• Perennial from a basal rosette with yellow flowers and a 'puff-ball'
seedhead
• Deep Taproot up to ½ “ in diameter
• Eradicate early, before seedhead forms
• Propagated by seed
Korean Garden Hoe – Ho Mi
Grand Mart, Route 7
Vegetable Companion Plants
Plant
Basil
Bush Beans
Pole Beans
Beets
Cabbage Family
Bad
Companions
Good Companions
Pepper, Tomato, Marigold
Beets, Cabbage, Carrots, Celery, Corn, Cucumbers, Eggplant, Lettuce,
Onion
Pea, Radish, Strawberry, Savory, Tansy, Marigold
Carrots, Corn Cucumber, Eggplant, Lettuce, Pea, Radish, Savory,
Beets, Onion
Tansy
Bush Beans, Cabbage, Onion, Sage
Bush Beans, Beets, Celery, Onions, Tomato, All Strong Herbs,
Strawberry
Marigold, Nasturtium
Carrots
Bush Beans, Pole Beans, Lettuce, Onion, Peas, Radish, Tomato, Sage Dill
Celery
Corn
Parsley
Bush Beans, Cabbage, Onion, Spinach, Tomato
Bush Beans, Pole Beans, Cucumber, Melons, Peas, Squash
Tomato
Bush Beans, Pole Beans, Corn, Lettuce, Onions, Peas, Radish,
No Strong Herbs
Marigold, Nasturtium, Savory
Bush Beans, Pole Beans, Spinach, Dill
Bush Beans, Pole Beans, Carrots, Cucumbers, Onion, Radish,
Strawberries
Corn, Nasturtium, Radish
Beets, Cabbage, Carrots, Celery, Cucumber, Lettuce, Pepper, Squash,
Bush Beans, Pole Beans, Peas
Strawberries, Tomato, Savory
Tomato
Peas
Bush Beans, Pole Beans, Carrots, Corn Cucumber, Radish, Turnips
Pepper
Onion
Bush Beans, Pole Beans, Carrots, Cucumber, Lettuce, Melons, Peas,
Hyssop
Squash
Celery, Eggplant, Cauliflower
Corn, Onion, Radish
Bush Beans, Lettuce, Onion, Spinach
Cabbage
Cabbage, Carrots, Celery, Onion, Mint
Corn, Fennel
Cucumbers
Eggplant
Lettuce
Melons
Onion
Radish
Spinach
Squash
Strawberry
Tomato
Onion
Local Plant Resource:
www.fairfaxmastergardeners.org
******
Resource for presentation:
Virginia Tech Weed ID Site
http://www.ppws.vt.edu/weedindex.htm
~~~~~~~~~~~~~~~~~~~~Enj
oy the New Growing
Season!!
~~~~~~~~~~~~~~~~~