groundcover

Soft Khakiweed

The Story

Plant Bio

Gomphrena celosioides is a prostrate, mat-forming herbaceous species native to South America that spreads via sprawling, multi-branched stems covered in fine white hairs. It develops a deep, thickened taproot that provides exceptional drought resistance in poor, sandy, or disturbed soils.

This species produces dense, cylindrical spikes of papery white to greyish-white bracts that conceal tiny, inconspicuous true flowers. Unlike the painfully spiny khaki weed, its floral spikes remain soft and woolly to the touch throughout the season.

Uses & Benefits:

Forms a dense, silvery-green ground-hugging mat with unique, papery white cylindrical flower spikes.

Provides excellent ground cover and erosion control in highly disturbed, dry, sandy, or nutrient-poor soils where other plants fail.

Attracts generalist native pollinators, including small bees and butterflies, while ants harvest and disperse the seeds.

Essentials

At a Glance

Plant Type

Groundcover

Height

16"

Width

39"

Light

Full Sun

Zones

9, 10

Water

Low

Humidity

High

Lifespan

Annual or short-lived perennial

Native To

South America

Toxicity

Non-toxic

Bloom period

Summer – Fall

In flower about 6 months of the year

Planting

How to Grow

Select a site with full sun exposure and highly drained sandy or gravelly soil.
Sow seeds directly into warm soil in late spring, pressing them lightly into the surface.
Water sparingly during establishment, then cease regular irrigation once the deep taproot develops.
Avoid planting in heavy clay or low-lying areas where water accumulates, as excess moisture causes rapid root rot.

Pro Tip

Excavate the entire thickened root crown when weeding; surface-level hand-pulling is ineffective because the deep taproot readily regenerates new shoots.

Keep It Thriving

Care Guide

Do

Ensure maximum soil drainage to prevent crown and root rot.
Expose the plant to full, unobstructed sunlight for optimal compact growth.
Wear gloves when handling the foliage if you have sensitive skin, as the dense trichomes can cause mild contact dermatitis.

Don't

Do not fertilize, as this species thrives and maintains its tight form in nutrient-poor soils.
Do not overwater or allow the soil to remain soggy.
Do not attempt to control mature plants by shallow mowing, which leaves the taproot intact.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Pest Check
Plant
Propagate
Prune

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

GroundcoverRock gardensErosion control on sandy slopesXeriscaping

Companion Plants

Portulaca grandiflora Melampodium leucanthum

Multiply

Propagation Methods

Good to Know

Common Questions

Soft Khakiweed questions

What zones can Soft Khakiweed grow in?

Soft Khakiweed is hardy in USDA Zones 9–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

When does Soft Khakiweed bloom?

Soft Khakiweed typically blooms in summer through fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Soft Khakiweed need full sun?

Soft Khakiweed does best in full sun (6+ hours).

Is Soft Khakiweed drought tolerant?

Yes — once established (usually after the first full season), Soft Khakiweed handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.