Koeleria macrantha
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Koeleria macrantha June Grass



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June Grass is also known as Prairie Junegrass and Koeleria cristata. This native, widely-distributed prairie grass will flower earlier than many other upland prairie grasses.  Its plumes of silvery-green seed heads turn tan by mid-summer.  The foliage supporting these seeds is also an attractive green-gray color.  June Grass actively grows during the spring and fall when soil temperatures are cool and likes full sun and dry, often sandy, soil.  Its preference for dry, sunny conditions makes it a popular candidate for green roofs.

Spring Potted Plants (3-packs and trays of 38) ship when all plants are well-rooted and transit-ready, early May through JuneClick here if you prefer to mix/match up to 6 species in a tray.

Koeleria macrantha - June Grass

Map Key

This map shows the native and introduced (adventive) range of this species. Given appropriate habitat and climate, native plants can be grown outside their range.

4 Questions asked on Koeleria macrantha






Q Ryan • May 13 What is the seeding rate for a solid stand of this prairie grass?
A Prairie Moon • May 14 We would suggest about 3.5 lbs/acre, or 1 oz for every 1000 sq ft on June Grass.
Q Sarah • February 6 Will this tolerate mowing for use as a lawn replacement? Thank you!
A Prairie Moon • February 7 June Grass is used as a ground cover and grows in a clumping shape. It can be left tall or it can be mowed occasionally. It probably won't tolerate frequent, short mowing. You will want to have your lawn mower on a higher setting than you would with traditional turf grasses.
Q Dandelion • February 23 How aggressively does this grass spread? Is it suitable for a small “pocket prairie”. Thanks in advance. 🐝
A Prairie Moon • February 24 We highly recommend Junegrass for landscape plantings. This is a clump forming grass that may spread slowly by seed if environmental conditions are ideal, but the rate of spread is slow. We would not consider this to be an aggressive grass.
Q sarah • March 6 Is Koeleria macrantha salt tolerant?
A Prairie Moon • March 9 More research needs to be done, but this species seems to tolerate some salt exposure. See a study by University of Minnesota here: Junegrass Salinity Tolerance

"Overall, junegrass was more salt-sensitive during germination but more tolerant to salinity when mature. Salinity tolerance of junegrass may be further improved through turfgrass breeding because salinity tolerance varied in different populations."
SEED:

Growing your own plants from seed is the most economical way to add natives to your home. Before you get started, one of the most important things to know about the seeds of wild plants is that many have built-in dormancy mechanisms that prevent the seed from germinating. In nature, this prevents a population of plants from germinating all at once, before killing frosts, or in times of drought. To propagate native plants, a gardener must break this dormancy before seed will grow.

Each species is different, so be sure to check the GERMINATION CODE listed on the website, in the catalog, or on your seed packet. Then, follow the GERMINATION INSTRUCTIONS prior to planting. Some species don't need any pre-treatment to germinate, but some species have dormancy mechanisms that must be broken before the seed will germinate. Some dormancy can be broken in a few minutes, but some species take months or even years.

Seed dormancy can be broken artificially by prolonged refrigeration of damp seed in the process of cold/moist STRATIFICATION. A less complicated approach is to let nature handle the stratifying through a dormant seeding, sowing seeds on the surface of a weed-free site in late fall or winter. Tucked safely beneath the snow, seeds will be conditioned by weathering to make germination possible in subsequent growing seasons.

To learn more, download: Seed Starting Basics.

DORMANT BARE ROOT PLANTS:

We dig plants when they are dormant from our outdoor beds and ship them April-May and October. Some species go dormant in the summer and we can ship them July/August. We are among the few still employing this production method, which is labor intensive but plant-friendly. They arrive to you dormant, with little to no top-growth (bare-root), packed in peat moss. They should be planted as soon as possible. Unlike greenhouse-grown plants, bare-root plants can be planted during cold weather or anytime the soil is not frozen. A root photo is included with each species to illustrate the optimal depth and orientation. Planting instructions/care are also included with each order.

Download: Installing Your Bare-Root Plants

POTTED PLANTS:

Trays of 38 plants and 3-packs leave our Midwest greenhouse based on species readiness (well-rooted for transit) and based on order date; Spring shipping is typically early-May through June, and Fall shipping is late-August through September. Plant cells are approximately 2” wide x 5” deep in the trays, and 2.5" wide x 3.5" deep in the 3-packs; ideal for deep-rooted natives. Full-color tags and planting instructions/care are included with each order.

Download: Planting and Care of Potted Plants

*PLEASE NOTE: we are a mail order nursery and have no retail facilities, but you may pick up your order if prior arrangements are made. Pick up orders are subject to **MN Sales Tax.

Shipping & Handling Charges:
SEED $100.00 and under: $5.00
over $100.00: 5% of the total seed cost
(for orders over $1,000 a package signature will be required)

BARE ROOT and POTTED PLANTS $50.00 and under: $7.50
over $50.00: 15% of the total plant cost
(for orders over $1,000 a package signature will be required)

TOOLS and BOOKS have the shipping fee included in the cost of the product (within the contiguous US).

**We are required to collect state sales tax in certain states. Your state's eligibility and % will be calculated at checkout. MN State Sales Tax of 7.375% is applied for orders picked up at our MN location. Shipping & handling charges are also subject to the sales tax.

Shipping Season:

SEED, TOOLS and BOOKS are sent year-round. Most orders ship within a day or two upon receipt.

BARE ROOT PLANTS are shipped during optimal transplanting time: Spring (April-May) and Fall (Oct). Some ephemeral species are also available for summer shipping. Since our plants are field-grown, Nature sets the schedule each year as to when our season will begin and end. We fill all orders, on a first-come, first-serve basis, to the best of our ability depending on weather conditions beyond our control.

POTTED PLANTS (Trays of 38 and 3-packs) typically begin shipping early May and go into June; shipping time is heavily dependent on all the species in your order being well-rooted. If winter-spring greenhouse growing conditions are favorable and all species are well-rooted at once, then we ship by order date (first come, first serve).  We are a Midwest greenhouse, and due to the challenges of getting all the species in the Mix & Match and Pre-Designed Garden Kits transit-ready at the same time, we typically can't ship before early May.  Earlier shipment requests will be considered on a case-by-case basis.

*We are unable to ship PLANTS (bare root or potted) outside the contiguous US or to CALIFORNIA due to regulations.

Delivery:

We ship using USPS, UPS and Spee Dee. UPS and Spee Dee are often used for expediting plant orders; they will not deliver to Post Office Box numbers, so please also include your street address if ordering plants. We send tracking numbers to your email address so please include it when you order.

FOR MORE DETAILED SHIPPING INFORMATION, INCLUDING CANADA SHIPPING RATES (SEED ONLY), PLEASE SEE 'SHIPPING' AT THE FOOTER OF THIS WEBSITE.

iDetails

Seeds/Packet
1,000
Seeds/Ounce
200,000
Germination Code
A     D     G
Life Cycle
Perennial
Sun Exposure
Full
Soil Moisture
Medium-Dry, Dry
Height
2 feet
Bloom Time
June, July
Advantages
 * 
USDA Zones
3-9
Plant Spacing
10-12"
Catalog Number
KOE02G