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Is sagebrush a hazard in Idaho
In the first thirty feet, yes. Idaho Firewise garden signage says avoid juniper, sagebrush, or pine that burn easily when they dry out in late summer and fall. Sagebrush is flammable because of its oil content and should not be in Zone 1 or Zone 2. Zone 3 native plantings, including sagebrush, should be thinned. This directory’s Artemisia tridentata currently computes as avoid. The Artemisia genus page currently computes as on-list. Those are not the same plant.
You are in sagebrush-steppe looking at the state flower sign (syringa) and at big sagebrush to the lot line, and asking whether the landscape shrub is a Firewise native. The opened sheet names syringa as a suitable native and sagebrush as oil-flammable. It does not call sagebrush a state shrub.
This is not an Idaho doorway. Idaho plant evidence composes USDA occurrence, exact-state PNW 590 evidence, and the 419-owner Southern Idaho master database without relabeling that regional source statewide.
Why it matters
Native is not on-list. Idaho Firewise says so on the same panel that praises natives. Averaging the genus 7 of 10 wormwood score with big sagebrush invents a shrub the master database did not score. A greenstrip next door in Nevada is a 300-foot seeded fuel break, not a reason to keep oily sage in the first thirty feet.
Zone 0 is still not a planting list. Idaho Firewise Zone 1 is 0–5 feet, Firewise plants only.
How it works
Idaho Firewise garden signage (opened PDF, 2024):
- Idaho’s state flower, syringa (mock orange). Suitable natives: mock orange, creeping Oregon grape, black-eyed Susan.
- Some natives are very flammable. Avoid juniper, sagebrush, or pine that dry out in late summer and fall.
- Zone 1: 0–5 feet, Firewise plants only. Zone 2: 5–30 feet, reduce density. Zone 3: 30–100 feet, thin and prune. Increase distances uphill.
- Zone 3 native plantings, including sagebrush, should be thinned, pruned, and maintained to reduce underlying grasses. Bitterbrush and rabbitbrush are named as other sagebrush-steppe brush.
- Sagebrush: oil content; not in Zone 1 or 2.
Idaho Firewise master database (opened 2017 PDF):
- Artemisia spp. Wormwood scored 7.
- Garden artemisias scored 5–7 (fringed sage 5, prairie sage 5, dusty miller 7).
- Artemisia tridentata is not in the opened score list.
UNR FS-97-36 (opened HTML):
- Greenstrips: long, narrow bands of fire-retardant vegetation. Nevada sagebrush-grassland: 300 feet wide, about 36 acres per mile.
- Seed plants that are difficult to ignite and burn with low intensity. Used around homes in high-hazard rangeland.
- Low sagebrush and meadows can already be low-hazard fuel breaks. That is a landscape feature, not a Zone 1 planting.
This directory:
- Artemisia tridentata: avoid, limited-evidence. Ashland prohibited within 30 feet. USDA includes ID.
- Artemisia genus: on-list, majority. Idaho 7 of 10, mixed, plantable at 40 feet. USDA states on that record: ID.
- See one verdict per species. The genus 7 is not big sagebrush.
The paths
| What you have | Opened source | What it is not |
|---|---|---|
| Big sagebrush in the first 30 feet | Idaho Firewise: oil-flammable; keep out of Zone 1–2 | A native exemption |
| Sagebrush in Zone 3 | Thin, prune, reduce grasses | A planting list for Zone 0 |
| Artemisia genus on-list | Wormwood score 7 plus other garden lineages | A grade for A. tridentata |
| Nevada greenstrip | 300-foot seeded fuel break | Permission to plant sagebrush at the wall |
| Syringa on the sign | State flower; suitable native | Proof every native is Firewise |
What people mix up
- Sagebrush as Idaho’s official state shrub. The opened sign names syringa.
- Genus on-list as species on-list.
- A 40-foot Idaho mixed score as Zone 0.
- Greenstrip width as a yard bed.
- Ashland’s 30-foot prohibition as Idaho code. It is an Oregon city row on the species page.
How to check
- Open the Idaho Firewise garden signage PDF. Read the native-plants panel and the Zone 3 sagebrush paragraph.
- Open the 2017 master database PDF. Search tridentata. Confirm the wormwood 7.
- Open Artemisia tridentata and Artemisia.
- Open what a greenstrip is and UNR FS-97-36.
- Open Idaho plant evidence. Distribution is not a recommendation.
- Do not plant in Zone 0.
Limits
This page quotes the opened Idaho Firewise garden signage, the opened 2017 master database, opened UNR FS-97-36, and stored plant records. It does not invent an official Idaho state-shrub statute. A. tridentata is not scored in the opened master database. Zone 0 is not a planting list.
Related records
- Artemisia tridentata
- Artemisia
- Idaho plant evidence
- What a greenstrip is
- Why junipers get one verdict per species
- Glossary: Zone 0
Questions
Is sagebrush a hazard in Idaho?
In Zones 1 and 2, Idaho Firewise’s opened garden signage says yes. Avoid juniper, sagebrush, or pine that burn easily when they dry out in late summer and fall. Sagebrush is flammable because of its oil content and should not be located in the zones closer to homes (Zone 1 and Zone 2). Zone 3 native plantings, including sagebrush, should be thinned, pruned, and maintained to reduce underlying grasses.
Is sagebrush Idaho’s official state shrub?
The opened Idaho Firewise signage names Idaho’s state flower, syringa (mock orange), as a suitable native. It does not call sagebrush a state shrub. Sagebrush is the named shrub of the sagebrush-steppe ecosystem on that sheet. This page does not invent an official designation.
Why does the Artemisia genus page say on-list if sagebrush is avoid?
Because they are different records. Artemisia tridentata currently computes as avoid from an Ashland prohibited-plant row. Artemisia spp. currently computes as on-list, majority, with an Idaho Firewise master-database score of 7 of 10 (mixed; plantable at 40 feet) plus other garden-artemisia lineages. The opened 2017 master database scores Artemisia spp. wormwood 7; it does not list A. tridentata. See one verdict per species.
Does a Nevada greenstrip mean I plant sagebrush?
No. UNR FS-97-36 defines greenstrips as long, narrow bands of fire-retardant vegetation, often 300 feet wide in Nevada sagebrush-grassland rangelands. They are created by seeding plants that are difficult to ignite and burn with low intensity. That is not a list that puts big sagebrush in the first thirty feet. See what a greenstrip is.
Is this an Idaho doorway page?
No. The object is sagebrush at the house versus the genus page and the rangeland greenstrip. The Idaho surface keeps statewide PNW 590 evidence separate from the 419-owner Southern Idaho master database, USDA occurrence, and this source-backed article.