Coreopsis verticillata Zagreb
Zagreb Whorled Tickseed
Details12-18" 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.
HBLQ221 (Plant - 2.5" deep pot) - Out of stock.
HBLQ351 (Plant - 5" deep pot) - Out of stock.
|Common Name||Zagreb Whorled Tickseed|
|Botanical Name||Coreopsis verticilliata Zagreb|
|Zones||3, 4, 5, 6, 7, 8, 9|
|Light Requirements||Full Sun|
|Mature Height||12-18" tall|
|Mature Spread||18-24" wide|
|Bloom Time||Late spring to early summer|
|Ships As||Potted Plant|
|Planting Time||Spring / Summer, Fall|
|Soil Type||Clay Soil, Sandy Soil, Average Soil|
|Soil Moisture||Drought Resistant / Waterwise|
|Amount of Rain||10 to 20", 20 to 30", 30 to 40", 40 to 50"|
|Advantages||Deer Resistant, Attract Butterflies, Rabbit Resistant, Easy to grow, Good for Cut Flowers, Good for Containers, Native|
|Ideal Region||Anywhere In The US, Northeast, Midwest, Southwest, West, Pacific Northwest|
|Neonicotinoid-Free||Yes - Learn More|
|Ships to Hawaii, Alaska & Canada||No|
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.
- 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.
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.
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REVIEW SNAPSHOT®by PowerReviews
- Reviewer Profile:
- Avid gardener (3)
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- Personal (3)
Reviewed by 5 customers
Displaying reviews 1-5
- Deer Like It
I planted this two years ago in a south facing garden with clay soil, zone 6b. It arrived healthy and looked nice. However, I have young children who were not used to having anything in that particular garden bed, and on a couple of occasions the plant suffered casualties from children stepping on it. We also have deer visit our area who like to nibble on it. Despite being eaten/broken down to the base over and over, this little plant kept coming back. Finally, after placing a mesh screen around it for a month or so last year it managed to grow to a respectable size and looked beautiful! When I went to look on it this spring I saw that it had been eaten down to the main shoot again by deer. I was disappointed at first, but then noticed numerous small shoots coming up around it. I anticipate it will come back and flower beautifully again this year.
- Small In Size
The first set of 3 came in my Jumbo Waterwise Garden. They seemed dead, but the instructions said they often LOOK dead but are not. I planted them following the instructions. While the plants around them grew and thrived, they did NOTHING. Called Customer Service, and was told to wait a couple more weeks. Still NO GROWTH. Called Customer Service again: they sent out 3 more plants to fill in my JWG. Those 3 ALSO looked dead on arrival, but planted them anyway and crossed my fingers. NOPE. NADA. Will never attempt planting this variety of coreopsis again.
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I planted one in early April and four more in mid-June. All plants arrived with very little growth above the crown.
The early Spring plant never grew, and I ultimately received a product credit for it. Of the four that I planted in the Summer, two are showing growth above the ground, but no more than an inch. The other two were planted and watered according to the directions, but have not thrived in Zone 7.
Go with the Coreopsis Lanceolata Sterntaler instead. Once planted, it took off.
Good first year.
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- Difficult To Grow
First let me state that I love HCG. I have a front bed full of their plants. However, this plant was a real disappointment. I live in the Sierra above 6500 feet. I could not even get the tickseeds to survive in my green house. I does not appear to be a robust plant.
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Q & A
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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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