Coreopsis verticillata Zagreb

Zagreb Whorled Tickseed

12-18" tall x 18-24" wide. Coreopsis 'Zagreb' is a long blooming, easy-to-grow perennial with a big display of brilliant golden-yellow flowers beginning in late spring. Drought resistant/drought tolerant plant (xeric).
Zones3 - 9
Advantages
Native
Light Requirements
Full Sun
Annual Rainfall
10 to 20"
20 to 30"
30 to 40"
40 to 50"
Mature Height12-18" tall
Mature Spread18-24" wide
Bloom TimeLate spring to early summer
ShippingNo longer available this season. Learn More…
SizeNo
SKUHC016114

USDA Hardiness Planting Zones

To determine if a plant is sufficiently cold hardy, the USDA created numbered zones indicating winter low temperatures; the lower the zone number the colder the winter.

  • If the coldest winter temperature expected in your area is -15°F (zone 5) then any plants rated zones 3-5 will survive the winter temperatures in your area.
  • If you live in very warm winter areas (zones 9-11) plants with zones 3-4 ratings are not recommended. The lack of freezing winter temperatures do not provide a time for winter dormancy (rest).

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As low as $10.99 Sale $8.79
In stock
SKU
HC016114

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Details
12-18" tall x 18-24" wide. Coreopsis 'Zagreb' is a superior flowering perennial that grows readily in a wide range of garden conditions. It begins blooming in late spring covering itself with large brilliant golden-yellow flowers into the summer. Shear back after the first flush of flowers to encourage re-blooming later in the summer. Zagreb Whorled Tickseed spreads gently by rhizomes and has attractive finely textured bright green foliage. With good resistance to browsing deer, the plant is easy-to-grow and is well adapted across much of the country. Named after the Croatian capital of Zagreb.
More Information
Associated SKUsHC016114
HC014018 (Plant - 5" Pot)
Common Name
Zagreb Whorled Tickseed
Botanical Name
Coreopsis verticilliata Zagreb
Zones
3, 4, 5, 6, 7, 8, 9
Light Requirements
Full Sun
Flower Color
Yellow
Mature Height
12-18" tall
Mature Spread
18-24" wide
Bloom Time
Late spring to early summer
Ships As
Potted Plant
Soil Type
Sandy Soil, Clay Soil, Average Soil
Soil Moisture
Drought Resistant / Waterwise
Amount Of Rain
10 to 20", 20 to 30", 30 to 40", 40 to 50"
Advantages
Native
Ideal Region
Anywhere In The US, Northeast, Midwest, West, Southwest, Pacific Northwest
Planting Time
Spring / Summer, Fall
Neonicotinoid Free
Item Unit Of Measure
Plant
Ships To Canada
No
Planting Guides

Tips For Growing Coreopsis (Tickseed)

Coreopsis (Tickseed) are long-blooming native wildflowers that are easy-to-grow and provide ample nectar for butterflies. They're resistant to browsing rabbits and deer. Coreopsis can be divided into two groups that have different growing requirements: Coreopsis grandiflora and Coreopsis verticiliata (Threadleaf Tickseed) cultivars and hybrids.

1. Coreopsis grandiflora types (Tickseed) - these cultivars are generally grown from seed and are a short-lived perennial (3 to 4 years).

Preferred growing conditions:

  • Needs sandy/gravely and sandy loam type soils. Avoid clay.
  • Does best with gravel mulches.
  • After their second growing season, only requires deep but infrequent watering. Too much water makes them floppy and shortens their lifespan.
  • Plant in full hot sun.
  • Adding just a few handfuls of compost and Yum Yum Mix in the planting hole is enough. Don't plant into a rich, highly-amended soil.

Special comments

  • Deadhead plants to prolong bloom. Leave a few seed pods on the plants to encourage re-seeding.

2. Coreopsis verticillata (Threadleaf tickseed) and hybrids - These are long-lived perennials that spread by rhizomes to form wide, dense growing clumps.

Preferred growing conditions:

  • These species grow in a wide range of soil types including clay. Avoid very alkaline soils as they may get chlorotic (yellow foliage) due to unavailability of iron and other trace minerals.
  • These plants don't need mulching except in hot climates.
  • These are moisture-loving perennials and do best in moderately moist soil conditions.
  • Plant in full sun areas.
  • They like compost-enriched soils at planting time.

Special comments

Threadleaf tickseed plants are often late to wake in spring from dormancy, so don't worry when other neighboring perennials wake up first.

Garden care for all types of Coreopsis:

  • Fertilize Coreopsis just once in fall with Yum Yum Mix and Planters II. In addition, for C. verticillata types, green sand is recommended for alkaline soils to correct or prevent chlorosis.
  • Plants can be divided in mid-spring when clumps die-out in the center or become too large for their place in the garden.
  • Leave all Coreopsis varieties standing over the winter and cut back to 1-2" inches above the soil in mid-spring when the plants begin to wake up.

View more Planting Guides, or download our complete Planting Guide for tips on caring for your plants when you receive your order, as well as planting instructions for Perennials, Spring-Planted Bulbs, Fall-Planted Bulbs, Cacti & Succulents, Xeric Plants and more.
Shipping

No longer available this season.

As soon as your order is placed you will receive a confirmation email. You will receive a second email the day your order ships telling you how it has been sent. Some perennials are shipped as potted plants, some as perennial roots packed in peat.  The ‘Plant Information’ section describes how that item will ship. All perennials and spring-planted bulbs are packaged to withstand shipping and are fully-guaranteed. Please open upon receipt and follow the instructions included.

Perennials and spring-planted bulbs are shipped at the proper planting time for your hardiness zone. Perennial and spring-planted bulb orders will arrive separately from seeds. If your order requires more than one shipment, there is no additional shipping charge. See our shipping information page for approximate ship dates and more detailed information. If you need express shipping or have any questions, please call Customer Service toll-free at (800) 925-9387 or contact us by email.

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