How to Grow Gomphrena
'Strawberry Fields' from Seed
The everlasting globe amaranth — claret-red papery globe-shaped heads like small strawberries, with tiny yellow true flowers inside; a half-hardy annual AGM flowering from July to first frost that dries in the same vivid colour for 12 months; seeds need DARKNESS to germinate (cover tray with cardboard); pinch at 15cm for maximum branching; plant out in June only; heat and drought tolerant
Gomphrena haageana 'Strawberry Fields' (Globe Amaranth) is the everlasting flower that looks nothing like an everlasting. The flowers — technically papery bracts surrounding tiny true flowers — are globe-shaped, deep claret-red with a slight strawberry-like ridging and tiny yellow flowers visible at the top of each globe, like the yellow seeds of a real strawberry. They emerge on upright branched stems from mid-summer, and they continue to emerge continuously right through to the first autumn frosts, providing a supply of cutting material of extraordinary duration. And both fresh and dried, the colour holds: the intense claret-red that makes the plant so striking in the border from July onwards is the same colour visible in a dried arrangement in February, six months after the flowers were cut.
The one horticultural fact about Gomphrena that surprises most gardeners is its germination requirement: where almost every other seed in the cottage garden range needs light to germinate, Gomphrena requires darkness. Cover the seed tray with cardboard or black plastic after sowing and keep it warm and dark until the seedlings emerge. This single piece of knowledge transforms a plant that many gardeners report struggling with into one that germinates reliably and quickly. The second key practice is pinching out the central tip at 15cm — which converts a single-stemmed plant into a bushy, multi-branched structure producing many times more cutting stems than an unpinched plant.
Quick Facts at a Glance
Plant Type
Half-Hardy Annual H2 — frost tender; plant out June; flowers until first frost
Flowers
Globe-shaped papery claret-red strawberry heads with tiny yellow true flowers; Jul–Nov
Height
50–70cm; upright branched habit; excellent cut and dried flower
Key quirk
Seeds need DARKNESS to germinate — cover tray with cardboard or black plastic
Pinch
Pinch out central tip at 15cm for maximum branching and stem number
Difficulty
2 out of 5 — cover for darkness, pinch at 15cm, plant out in June
Understanding the Plant
Darkness Required for Germination
Gomphrena seeds require darkness to germinate — the opposite of most cottage garden seeds. After sowing, cover the tray with a sheet of cardboard or black plastic. Keep at 20–25°C. Remove the cover when the first seedlings emerge, typically within 14–21 days. Failure to provide darkness is the most common reason Gomphrena sowing fails.
The Everlasting Quality — What Makes It Exceptional
The papery bracts of Gomphrena are effectively already dried when fresh — the papery texture that gives the flower its structural permanence is the same in a fresh vase arrangement and a dried display six months later. The colour retention is extraordinary: where most dried flowers fade significantly from their fresh colour, properly dried Gomphrena Strawberry Fields maintains its claret-red for 12 months or more. For the cutting garden grower, this provides year-round colour from a single summer's growing — fresh flowers all summer, dried flowers through winter, and the same colour throughout.
The Pinching Rule at 15cm
When Gomphrena plants reach approximately 15cm height, pinch out the central growing tip between finger and thumb. This removes the single dominant stem and forces the plant to branch into multiple lateral shoots, each of which produces its own flowering stems. An unpinched Gomphrena plant produces a handful of long straight stems; a properly pinched plant produces a bushy structure with dozens of shorter, well-branched stems — significantly more cutting material over a significantly longer period.
Sowing & Growing On
Cover for Darkness — the Opposite of Most Seeds
Gomphrena is unusual in requiring darkness rather than light for germination. After sowing, cover the tray with cardboard or a black plastic bag and place in a warm location (20–25°C). Remove the cover as soon as seedlings emerge. This single action is the difference between reliable germination and persistent failure with this species.
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Sow indoors March–April at 20–25°C. Cover tray with cardboard or black plastic — seeds need darkness. Sow 5mm deep in moist seed compost. Cover immediately and keep in a warm dark location. Remove cover when first seedlings emerge (14–21 days). Transfer to bright conditions immediately on emergence.
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Prick out into individual 9cm pots when seedlings have 2–3 true leaves. Grow on at 18–20°C in bright conditions. Gomphrena seedlings grow steadily but are not particularly fast — allow 8–10 weeks from sowing to planting-out size.
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Pinch out the central growing tip when plants reach 15cm. Remove the top 2–3cm of the main stem. The plant branches vigorously within 7–10 days, creating the multi-stemmed bushy structure that maximises flower and cutting stem production.
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Harden off thoroughly and plant out in June when all frost risk has passed. Gomphrena is frost-tender — even a light frost will damage or kill plants. Full sun and well-drained sandy or loamy soil. Space 30–35cm apart. Avoid heavy wet clay.
Growing On & Care
Harvesting for Cutting and Drying
For fresh arrangements, cut when the globe is fully formed and the colour is at maximum intensity. Vase life is excellent — 10–14 days — and the papery texture means cut stems show virtually no deterioration in the vase. For drying, cut when the globe is fully open but the very centre remains tight (before the small yellow true flowers have fully opened). Hang upside down in small loose bunches in a dark, well-ventilated space — light causes significant colour fading in dried Gomphrena. Dried stems are ready in 2–3 weeks.
Heat and Drought Tolerance
Gomphrena haageana is native to the American South-West — New Mexico, Texas, and Mexico — and is one of the most heat and drought-tolerant annuals available from seed. In the hottest UK summers, while other annuals wilt, scorch, or simply stop flowering in the heat, Gomphrena continues blooming with increasing enthusiasm. Once established, it requires minimal watering and no feeding to maintain its long flower production through the summer and autumn.
Colour in the Late Season
One of the most valuable qualities of Gomphrena Strawberry Fields is its autumn performance. While many annuals exhaust themselves by August and become increasingly untidy from September, Gomphrena continues to produce fresh globes right through to November's first frost. This late-season stamina makes it invaluable for filling the gap that opening many cutting gardens leaves in September and October when the main summer flush of cosmos, sweet peas, and dahlias begins to wind down.
As an Everlasting
The papery bracts of Gomphrena retain their structure and colour better than almost any other dried flower. Cut at the correct moment (fully open globe, centre still tight), dry in the dark (to preserve the colour), and the stems remain usable for 12–18 months. Unlike many dried flowers that look dusty or faded by midwinter, properly dried Gomphrena Strawberry Fields maintains its vivid claret-red, making it one of the best value everlasting flowers for a UK cutting garden.
Pollinator Value
Despite its unusual flower structure — the small true flowers tucked inside the papery bracts — Gomphrena is attractive to butterflies and bees who readily find and access the true flowers within each globe. The continuous, very long flowering season from July to November provides a valuable late-season pollinator resource that complements the earlier cottage garden flowers that typically peak in June and July. The RHS AGM designation reflects both ornamental performance and garden value.
In the Border
The upright branched habit and rich claret-red of Gomphrena Strawberry Fields creates a warm, mid-height presence in a sunny border. At 50–70cm, it sits well in the middle ground, in front of taller dahlias and grasses but behind front-of-border plants. The warm red-and-yellow flower globe colour coordinates beautifully with hot-border schemes: alongside Rudbeckia, Helenium, golden grasses, and orange dahlias, it extends the warm palette from midsummer through to November.
Sowing & Flowering Calendar
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
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| Sow indoors (Mar–Apr; DARK) |
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| Plant out (Jun) |
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| Flowers (Jul–Nov) |
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Common Problems & Solutions
| Problem | Likely Cause | What to Do |
|---|---|---|
| Seeds not germinating | Light exposure during germination | Gomphrena seeds require darkness — exposure to light during germination prevents it. Cover the tray with cardboard or black plastic immediately after sowing. Keep at 20–25°C. Remove the cover when seedlings emerge. |
| Few flowering stems | Pinching skipped | Without the pinching step at 15cm, Gomphrena produces a single main stem with limited branching and far fewer cutting stems. Pinch out the central growing tip as soon as plants reach 15cm. If this was missed, cut back by one-third and the plant will branch from lower nodes. |
| Plants die after planting out | Frost damage | Gomphrena is frost-tender — even light frost will kill plants. Do not plant out until all frost risk has genuinely passed — in most UK locations this means early June. If frost is forecast after planting, cover with fleece overnight. |
| Dried flowers fading | Dried in direct light | Gomphrena colour fades rapidly when dried in direct sunlight or bright conditions. Dry in a dark, well-ventilated space — a shed, barn, or dark room. Properly dark-dried Gomphrena maintains its claret-red for 12 months or more. |
Plant Specifications
Claret-red strawberry globes from July to November — fresh for a fortnight, dried for a year
Sow in March–April and immediately cover the tray with cardboard — Gomphrena needs darkness, not light, to germinate. Keep at 20–25°C. Pinch out the central tip at 15cm for a bushy, multi-stemmed plant. Plant out in June when all frost has passed. Cut globes when fully open, dry in darkness to preserve the colour. The claret-red keeps coming until November and then lasts another year in dried arrangements.
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