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Start with Zagreb Threadleaf Coreopsis - Bare Root Plant, mix qualifying varieties,
track minimums and pricing, and coordinate future production in one place.
Zagreb is a well-loved threadleaf coreopsis whose flowers are a rich golden yellow, warmer and deeper than Moonbeam. It blooms steadily from early through late summer.
The plant forms a bushy yet airy clump of needle-fine foliage about 15 inches tall, compact enough for the front of a border or a container. It is long-lived, drought tolerant and easy to care for.
What it looks like
A bushy but airy clump about 15 inches tall and 18 to 24 inches wide, slowly widening by creeping roots, made of many upright stems. Foliage is very fine, needle-like and medium to dark green with a feathery texture. Daisy-like flowers about 1 to 1.5 inches across have eight bright golden-yellow petals with notched tips around a small darker gold center. At peak bloom the clump is thickly dotted with golden flowers across its top.
Growing it with lavender
It thrives in lavender's sun and lean, well-drained soil, and its golden flowers are a classic complement to lavender's purple through summer.
Care
Plant in full sun in average to lean, well-drained soil; it is drought tolerant once established and dislikes wet winter soil. Hardy in zones 4-9. Shear the plant back by about a third after the first big flush to tidy it and encourage more flowers.
At a glance
Botanical name: Anacis verticillata
Flower color: Bright golden yellow
Foliage: Medium to dark green
Growth habit: Bushy, airy clump
Mature size: 15 in tall × 18–24 in wide
USDA hardiness zones: 4–9
Light: full sun
Bloom start: Late-June
Peak bloom: Mid-July
Bloom pattern: Long Blooming
Deer resistance: Resistant
Pollinator value: Great
Sizes and shipping
Dormant bare-root plant, sold in boxes of 25 per variety (order in multiples of 25). Bare-root plants ship or are picked up March 1–May 31 only. They are soil-free, so they may ship to every state in that window. Dormant plants often show little or no top growth on arrival; plant or heel them in promptly.
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Mature height
15.0 in
Mature spread
24.0 in
Bloom
Late-June – peak Mid-July
Fragrance
None
Deer
Resistant
Lavender companion · grow guide
How to grow Zagreb
Coreopsis · Anacis verticillata
Threadleaf coreopsis (now Anacis verticillata, formerly Coreopsis) wants full sun and lean, well-drained soil. It thrives on neglect; rich or wet soil makes it flop.
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Full sunLight
Moderate waterAverage drainage
pH 5.5–8.0Soil
Zones 4a–9bHardiness
15″ tall24″ wide
ResistantDeer · rabbits resistant
Not known toxicPets
Huckleberry saysTell me where you grow and I’ll check if Zagreb will thrive there.
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Hardy in zones 4a–9b
Spring after hard frosts, or early fall at least 6 weeks before the ground freezes.
Your year with Zagreb
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When it arrives
Your bare-root plant
Arrives as a tangle of thin, wiry roots with a small crown of dormant buds or old stem stubs; it may look like dead twigs. Soak roots 20–30 minutes, plant crown at soil level, water in. Keep evenly moist until growth starts.
Expect new growth in about 6 weeks after planting. Bare root ships March–May while dormant, with little or no top growth, and it can look lifeless until then. That’s normal. A late riser: fine, needle-like shoots usually appear mid-to-late spring, often after many other perennials. Don't dig it up in April thinking it's dead; scratch the crown and look for green buds.
You won’t be able to tell within 24 hours of arrival whether a dormant plant will grow.
When to plant
Spring after hard frosts, or early fall at least 6 weeks before the ground freezes.
How deep
Set the crown even with the soil surface, with the fine roots spread out below. Don't bury the crown or mound mulch against it.
Spacing
About 18–24 in apart; plants spread slowly by short rhizomes.
Soil
Sandy, rocky or average loam; tolerates clay if it drains · pH 5.5–8.0
Fix-it tip: Don't enrich it. In heavy clay, loosen the bed and mix in grit or plant on a slight mound so the crown never sits wet in winter.
Sun
Full sun (tolerates part sun (a few hours of shade)).
More shade means fewer flowers and floppier stems.
Dormant→New growth
Don’t give up on it
Is it alive? What spring looks like
A late riser: fine, needle-like shoots usually appear mid-to-late spring, often after many other perennials. Don't dig it up in April thinking it's dead; scratch the crown and look for green buds.
Spring
Be patient; late to emerge. Cut back old stems.
Summer
Peak bloom; shear by a third after the first flush.
Fall
Light rebloom; plant or divide early fall.
Winter
Leave stems; keep drainage good.
Watering
First season: Water deeply once or twice a week the first summer, more in heat, until new growth spreads.
After that: Drought tolerant. Water only in long dry spells; too much water and fertilizer cause weak, flopping stems.
Feeding
Usually none. A light spring dose of compost is plenty; extra fertilizer makes it flop.
Pruning & deadheading
Deadheading each tiny flower isn't practical. After the first big flush fades, shear the whole plant back by about one-third to tidy it and often get fall bloom. Leave stems over winter and cut back in spring.
Dividing
Every 2–3 years in early spring or fall when the center thins out. Lift, split into rooted pieces, and replant.
Winter
Hardy to about zone 3–4. Leave stems standing for winter; it rots more from wet winter soil than from cold.
Summer heat
Handles heat and humidity well. Can look tired after the first bloom flush; a shearing refreshes it.
Plant flops open in the middle
Likely cause: Soil too rich or wet, or too much shade
What to do: Shear back by a third, stop feeding, and move to full sun and leaner soil.
No growth by mid-May
Likely cause: Normal late emergence, or winter wet killed the crown
What to do: Wait until early June; check crown for firm green buds. If mushy, replant in a better-drained spot.
Center dies out, ring of growth outside
Likely cause: Clump is aging
What to do: Divide in spring and replant the vigorous outer pieces.
Too wet or too dry?
Yellowing and mushy stems at the base mean wet soil. Crisp brown foliage in drought means it needs a deep soak.
Watch for
Crown or root rot in wet soil
Southern blight in hot, humid regions
Few insect problems
Pets & wildlife
NC State lists threadleaf coreopsis as non-toxic to cats, dogs and horses.
Deer: resistant · Rabbits: resistant
Finnegan saysStill not sure what’s wrong? Ask Plant Health — describe it or add a photo.
In a container
Good in pots · 2 gallon+
Works well in pots with regular potting mix plus grit. Water when the top inch is dry. Overwinter potted plants in an unheated garage or bury the pot in the ground.
Indoors
Outdoor plant
Needs full sun and a winter dormancy outdoors.
Winter chill
No chill needed
NC State notes seeds need no cold treatment; plants grow and bloom without special chilling.
Growing it on
Dormant bare root, soaked and planted
Or a 1–2 gallon pot if the ground isn’t ready
Garden bed or a 2 gallon pot
Time to move up? Slide the plant out: if white roots wrap the outside of the soil, it’s ready for the next size.
Planting with lavender
Plant it right alongside lavender
A classic partner: same full sun, lean soil and low water. The airy yellow or pink froth softens lavender's spiky gray form and blooms with and after it.
Lavender companion · grow guide
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