fbpx Skip to content

Black Beauty® Keystone Pennsylvania Grass Seed

Write a Review


- +
  • Specially formulated for Pennsylvania lawns
  • Thrives in full sun to medium-shaded areas
  • Grows dark green, drought-resistant, and highly durable lawns
  • Germinates in 10 – 14 days
Real Pennsylvania Keystone Lawns
Product Overview
Achieve a beautiful Pennsylvania lawn with Jonathan Green Black Beauty® Keystone Grass Seed. Specifically tailored for the state's unique climate, this premium cool-season mixture contains Black Beauty tall fescues, perennial ryegrass, and Kentucky bluegrass to deliver an attractive, resilient, and low-maintenance yard.

Grow a naturally dark-green, perennial lawn that thrives in full sun and medium-shaded areas. With built-in resistance to insects and diseases, Black Beauty® Keystone naturally protects your lawn. Experience rapid germination in just 10 to 14 days and exceptional adaptability to Pennsylvania's diverse climates for a vibrant lawn.

Establishing strong roots up to four feet deep, Black Beauty® Keystone features blades with a protective waxy coating that preserves moisture, ensuring your lawn stays lush. With its uniform growth habit and dark color, this seed will grow an attractive lawn that you can be proud to call your own. Join the community of Pennsylvania lawn owners who trust Jonathan Green for an awe-inspiring lawn transformation.
Coverage Guide


New Lawns
3 lb.
Up to 2,250 sq. ft.
Up to 1,125 sq. ft.
7 lb.
Up to 5,250 sq. ft.
Up to 2,625 sq. ft.
25 lb.
Up to 18,750 sq. ft.
Up to 9,375 sq. ft.
How Do I Calculate My Lawn Size? First measure the length and width of your lawn. Then multiply the length by the width and deduct the square footage of any non-lawn areas (landscape bed, patio, deck, pool, etc.) from the total. Now you know how much product you need to purchase!
Shipping & Returns


  • Free ground shipping now available on orders of $75 or more! For smaller orders, shipping costs are calculated at checkout.
  • We ship orders the same day if placed by 2PM EST (later orders will be shipped the next day).
  • Orders are not shipped or delivered on weekends or holidays.
  • We offer ground and expedited shipping.


  • We offer 30-day free returns for replacement or full refund for items that are damaged or defective (shipping included). If damaged by the carrier, please file a claim with them.
  • If your items have been used or aren’t in the original packaging, we will give you a refund (minus the cost of shipping) based on the condition of the product.

View our complete shipping and return policy. If you have questions about your order, please contact our customer service team at [email protected].

Don’t Forget These Essentials

  • Tall fescues, perennial ryegrass, and Kentucky bluegrass

  • For cool-season lawns, the best time to apply grass seed is in fall (between mid-August to mid-October), or in spring (between mid-March to mid-May). For grass seed to germinate, soil temperatures must be at least 55°F. Best root growth occurs between 55° and 70°. If soil temperatures are at or above 75°, seedling root establishment will not occur.
  • 5+ hours of sunlight per day

  • Black Beauty® Keystone can withstand heavy traffic

  • 10 – 14 days

  • Grass seed can be applied with any of our soil amendments, or straight fertilizers. We do not recommend applying grass seed with any weed controls. You must wait at least 30 days to seed after applying weed control. For a full list of wait times, visit this FAQ page.

    • For best germination, water seeded areas twice a day, for 5 – 10 minutes to keep the seedbed moist. Continue watering daily for a few weeks until the grass plants reach a height of 2 – 2.5 inches.
    • A good rule of thumb for established lawns, is to give them one inch of water per week including rainfall. To avoid your lawn going dormant in the summer, you may need to increase your watering rate
    • Begin mowing your new lawn when the new grass has reached a height of 3 – 4 inches.
    • Be careful not to scalp your lawn, as low mowing will stress the root system and encourage the growth of weeds. When mowing, only take off the top third of the grass blade.
  • Our recommendations for storing your grass seed: 

    Place it in a cool dry place, off of the ground, out of direct sunlight, and keep it away from moisture. Under these conditions, grass seed will last at least two years.

  • Always read and follow the product label before use.




    Safety Data Sheets can be found at www.jonathangreen.com/safety-data-sheets-sds. If you have a specific question, do not hesitate to contact us.


spreader product


spreader product


spreader product


spreader product


Step 1/4

Who makes your spreader?

Jonathan GreenScotts

Don’t see your spreader here? Contact the manufacturer or review your spreader’s manual.


Step 2/4

What type of spreader are you using?

Rotary Handheld Drop


Step 3/4

What is the model of your spreader?

Standard Rotary Deluxe and Pro Hand Crank Basic Broadcast Deluxe EdgeGuard Turf Builder EdgeGuard Mini Turf Builder EdgeGuard DLX SpeedyGreen 1000, 2000, & 3000 All Rotary Turf Builder Classic AccuGreen 2000-3000 AccuGreen 1000

Don’t see your spreader model here? Contact the manufacturer or review your spreader’s manual.


Step 4/4

Select the rate that best suits your lawn needs.

Depending on the type of product you selected there may only be one application rate.

Overseeding RateNew Lawn RateNew Lawn Rate Rate

Note: “New lawn” indicates that you are starting a lawn from bare dirt vs overseeding or applying product to an existing lawn.


Black Beauty® Keystone Pennsylvania Grass Seed

Your Spreader Setting is:

Start over

Features You’ll Love

Our Black Beauty® Keystone Pennsylvania Grass Seed is made of cool-season grasses that can survive the snow in winter, and thrive in the heat and humidity of a PA summer.

Specifically Formulated for Pennsylvania

Contains a specially curated mixture of cool-season grasses, including tall fescue, perennial ryegrass, and Kentucky bluegrass, that adapt well to the hot and humid conditions of Pennsylvania summers.
Specifically Formulated for Pennsylvania

Perfect for Sunny or Shady Areas

This versatile grass seed thrives in areas of your lawn that get full sun to medium shade.
Perfect for Sunny or Shady Areas

Naturally Insect and Disease Resistant

This dark green grass has a waxy leaf coating that serves two purposes: protecting against insects and lawn diseases, and keeping moisture locked in for increased drought resistance.
Naturally Insect and Disease Resistant

How to Seed



To ensure the seed reaches the soil, mow the lawn on the lowest setting and


Use a metal rake to remove debris, rocks, and thatch that has built up. Rake vigorously to create grooves in the top layer of soil. Fill in any holes and level the ground with additional topsoil if necessary.


Test your soil pH to check that it is in a healthy range for grass plants to grow. Optimal pH for cool-season lawns is 6.2 to 7.0. For soils with a pH below 6.2, use Jonathan Green Mag-I-Cal® Plus for Lawns in Acidic & Hard Soil to rapidly raise soil pH. For a pH above 7.0, use Mag-I-Cal® Plus for Lawns in Alkaline & Hard Soil to lower soil pH.



To evenly distribute grass seed, use a spreader suitable for your specific lawn size. Set the spreader according to the recommended setting on the packaging or use our Spreader Settings Tool above. Make sure to update the setting with each product you apply.


Carefully read and follow all instructions on the product labels prior to application. Before spreading, calculate the amount of seed needed for the square footage of your lawn.

For new lawns:
Start by filling the spreader with half of the grass seed. Apply the seed around the perimeter of the lawn to establish a turning area. Make straight passes back and forth across the length of the lawn in one direction (north to south) and then the remaining seed in a perpendicular direction (east to west) within the outlined area. Overlap slightly between passes and close the hopper when turning. Walk at a steady pace for even distribution. This crisscross pattern ensures even coverage and helps prevent bare spots in new lawns.

For overseeding:
Begin by spreading the seed along the perimeter of your lawn. Make straight passes back and forth across the length of the lawn in a mowing pattern until the entire area is covered. Overlap slightly between passes and close the hopper when turning. Walk at a steady pace for even distribution.


After seeding, gently rake the soil with a metal rake to incorporate the grass seed into the top quarter-inch of soil. This will improve seed-to-soil contact and promote germination.


Maximize seedling growth and root development by applying starter fertilizer along with the seed. Fill your spreader on a hard surface to avoid fertilizer burn. Start by applying fertilizer around the lawn’s perimeter to establish a turning area. Then, make back-and-forth passes within the outlined area, ensuring overlap for complete coverage. Sweep any excess granules off of hard surfaces and back onto the lawn.


Immediately after seeding, thoroughly water the area but not to the point of run-off or puddles.



Keep the soil consistently moist by watering lightly several times a day, or as needed, to prevent drying out. Avoid excessive watering that may cause pooling or runoff. Continue watering daily for a few weeks until the grass plants reach a height of 2 – 2.5 inches. As the grass seed germinates, gradually reduce the frequency of watering while increasing the amount applied to encourage deeper root growth.


Begin mowing when the new grass has reached a height of 3 – 4 inches. Make sure the mower has sharp blades. Be careful not to scalp the lawn, low mowing will stress the root system and encourage the growth of weeds.

Black Beauty® Keystone Pennsylvania Grass Seed 3 lb.
- +