Thistle Weed Seeds

Grow Heirloom Herbs – Plant Milk Thistle SeedsFamiliar to gardeners and laymen across the globe, Milk Thistle was once native to southern Europe, but is now widely distributed around the world. The good news is that it grows anywhere, the bad news is that some consider it nothing more than a weed. Known by many names, Common Name: Canada Thistle

Shipping Schedule

Pre-ordered Bulbs: Pre-orders will not ship immediately, but they will be delivered at the ideal time for planting in your area. Spring pre-orders are placed any time before March 1. Fall pre-orders are placed any time before September 1. For customers who order bulbs in advance, please see the shipping schedule below. Orders containing both seeds and bulbs may be split into multiple shipments.

Pre-Ordered Spring Bulbs & Perennials Shipping Begins
Zones 9 – 12 Mid March
Zone 8 Mid to Late March
Zone 7 Late March to Early April
Zone 6 Mid to Late April
Zone 5 Early to Mid May
Zones 2 – 4 Mid to Late May
In-season orders ship immediately at the time of purchase to all zones until inventory is depleted.

Saffron Crocus & Bearded Iris Shipping Begins
All Zones Late August

Pre-Ordered Fall Bulbs Shipping Begins
Zones 2 – 5 Mid to Late September
Zone 6 Late September
Zone 7 Late September to Early October
Zone 8 – 12 Early to Mid October
In-season orders ship immediately at the time of purchase to all zones until inventory is depleted.

Pre-Ordered Fall Perennials* Shipping Begins
All Zones Mid October
*Amaryllis Bulbs, Hosta Roots, Lily Bulbs, Papaver Roots, Paperwhite Bulbs, Peony Roots & Siberian Iris Roots
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Multiple Ship Dates

Your credit card will be charged for the full amount of your order at the time your order is submitted, regardless of the shipping time for your items. If your order requires multiple shipping dates, you will never be charged more than once for shipping charges. This allows us to ship your non-seasonal items to you as soon as possible, as well as allocate our seasonal product for your order.

For example, a customer places an order in February consisting of 5 Pounds of Wildflower Mix and 50 Darwin Hybrid Tulip Bulbs. The order would be charged in full upon submission, the seed would be shipped immediately, and the bulbs would be shipped at the optimal time in the autumn based on the customer’s zip code.

Canada Thistle

Efforts must be made to prevent seed maturation and dispersal of plants into new areas. Additionally, no transportation, propagation, or sale of these plants is allowed. Failure to comply may result in enforcement action by the county or local municipality. Minnesota Noxious Weed Law

Background

Canada thistle is native to Europe. It was introduced to North America in the 1600s, probably in agricultural seed shipments and is now widespread throughout the United States and Canada.

Description

  • An aggressive perennial with a vigorous root system that continually produces new shoots, invading new areas and outcompeting other vegetation types.
  • Grows 2 – 5 feet tall.
  • Leaves are alternate, lance shaped, irregularly lobed, and have wavy spiny/toothed margins.
  • Stems are usually smooth, but sometimes have short hairs and are slightly grooved.
  • Flowers are purple and pink, occasionally white, and are borne at the end of the stems in clusters. Buds are 1/2 inch wide by 3/4 -1 inch long, have a tear-dropped shape, and lack spines.
  • This plant is a prolific seed producer and also spreads by roots.
  • Seedlings emerge as small rosettes in the fall or early spring, eventually bolting into erect branched flowering stems. Flowers begin to develop in late June, blooming between July and August.
  • This plant is most recognizable in mid-July when flowers change to seedheads with obvious white fluffy tops. Seeds are attached to the “fluff” and can become airborne and spread to new areas.
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Habitat

Found growing in a wide range of habitats. Typically infests a variety of disturbed landscapes and is commonly found along roadsides, trails, natural areas, pastures, forest and field margins, mining locations, waste areas and unmaintained gravel pits. This plant establishes quickly after new road construction, housing and development projects, overgrazing of pastures, forestry clear-cuts, and destructive flooding events.

Means of spread and distribution

Spreads primarily by rhizomes and seeds. Found commonly throughout Minnesota.

Impact

This plant is highly invasive, severely reduces pasture capacity and desirable forages, degrades wildlife habitat, and can hinder reforestation and landscape restoration efforts. Once a population gets established, it begins to quickly displace native vegetation, including desirable pollinator habitat, creating large stands with little biological diversity and low habitat value.