What is Purple Needlegrass?

Purple Needlegrass (Stipa pulchra), California’s state grass, is a tough perennial bunchgrass with deep roots and high ecological value. Forming graceful bunches 1–3 feet tall, it produces slender purple-tinged flowering stalks in spring. Highly drought-tolerant and long-lived, it survives hot dry summers by going dormant and regreens with fall rains. It adapts to many soils—including heavy clays and serpentine—and its extensive roots help prevent erosion. In native prairies, it provides forage in winter/spring and critical wildlife habitat. A cornerstone of California restoration projects, it’s ideal for revegetating hillsides and creating authentic low-water landscapes.
This Purple needlegrass seed was originally collected from Riverside county and grown at Las Flores Farm in Santa Barbara county.

Specifications

Sun Requirement

Full Sun to Partial Shade

Soil Preference

From sandy to heavy clay and serpentine; tolerates droughty and alkaline sites

Soil pH

Adaptable (slightly acidic to alkaline)

Time to Maturity

Perennial; reaches mature size in ~1–2 years

Height when mature

1–3 ft foliage; ~3 ft with flowering stalks

Seeding Rate

~4-6 lbs/acre drill seeded; 15–20 lbs/acre broadcast seeded

Planting Depth

1/4–1/2 inch

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Purple Needlegrass

Stipa (Nassella) pulchra | SKU: W-NAPU

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Price range: $8.99 through $28.89

0.25 Lb - 500 Sq Ft
$8.99
0.5 Lbs - 1,000 Sq Ft
Original price was: $16.99.Current price is: $15.29.
1 Lb - 2,000 Sq Ft
Original price was: $33.99.Current price is: $28.89.

Planting Aids for your Seed

Why Choose This Seed?

Superb Drought Resilience

Very deep roots access moisture and ensure survival in extreme drought.

Erosion Control

Purple needlegrass has dense, deep root systems that bind soil—excellent for stabilizing slopes.

Native Habitat Value

This bunchgrass provides habitat cover and forage year after year, and is considered a foundational species in CA grasslands.

Adaptable & Hardy

Needlegrass thrives in sun/partial shade and many soil types. It is fire-tolerant and long-lived (a single plant can live more than 100 years!)

Restoration Essential

Due to its hardiness, habitat value, and carbon sequestration value, Purple Needlegrass is widely used in ecological restoration projects of many scales.

Seed Description

Product Details

Sun/Shade

Full Sun to Partial Shade

Height

1–3 ft foliage; ~3 ft with seed stalks

Seeding Rate

15–20 lbs/acre

Uses

Grassland restoration, erosion control, wildlife habitat, low-water landscaping

Color

Green foliage; purple-tinged seed heads in spring

Water

Very Low—winter rain; summer dormant

Native/Introduced

Native to California

Life Form

Perennial bunchgrass

Planting Guide

When to Start & Weed Control

Start prepping your planting area in fall, so that you are ready to seed between late September and early February, when temperatures cool and rain is on the horizon.
Weed your growing area BEFORE planting any native seeds. We recommend not only pulling visible weeds but also “flushing out” the weed seeds that are waiting in the soil. Irrigate the area and wait for weed seeds to germinate, then remove them using your method of choice. Irrigate again, wait, and perform another round of weed control. Repeat 2-3 times.

Soil Prep

Ensure your soil is as bare as possible for the maximum amount of seed-to-soil contact. If the entire area can’t be completely cleared, rake out as much dead plant material from the area as you can to create bare patches of soil for the seed to make contact with. For best results, the soil should be easily crumbled and not heavily compacted.

Seeding

It is best to seed onto slightly damp soil. If necessary, water the top 1/4 inch of soil before seeding. Scatter seed directly on the soil surface and rake gently or lightly press the seed into the soil. Do not bury the seed deeper than 1/4 inch into the soil.

Water

After planting, keep the top 1/4 inch of soil consistently moist until the seeds have germinated and the first true leaves have emerged. A good rule is to water lightly every day intul the seedlings are an inch high, then you can reduce watering to every 3 days. Skip days when it rains. Within 6 weeks after germinating, your plants should need only occasional watering. Don’t over-water your plants, especially in summer.

Questions & Answers

Is purple needle good forage?

Yes in winter/spring; avoid grazing after seeds harden due to sharp awns.

How deep are the roots?

In deep soils, recorded to 5–16 ft.

Does it reseed?

Yes; increases coverage by self-seeding into open soil.

When does it grow?

Cool-season growth; summer dormancy; flowers late spring.

How to maintain in a meadow?

Focus on weed control; mow high; avoid summer irrigation.

Why important?

Keystone native grass; erosion control; habitat; drought hardy.

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