Field notes
- One April sowing is not year-round scallions. Succession is the assignment.
- Weed competition in alliums is not “natural balance.” It is yield loss with grass perfume.
- Shallow roots mean surface drought shows fast. Limp tops are a moisture memo.
- Unthinned dense stands produce wires, not scallions.
- If the only scallions in your kitchen are rubber-banded from the store, this module has not been attempted.
Learning objectives & crop biology
Bunching types regrow after cutting and may be divided; common onion seedlings harvested early are single-use. Cool springs favor establishment; summer drought requires irrigation; winter wet is tolerable with drainage. Alliums are poor competitors—bed hygiene matters.
Failure mode
Calling a crop “easy” and then skipping water, weeds, and succession is how easy crops fail. Difficulty was never the variable—discipline was.
Irradiance
6–8 h sun. Light shade thins growth; deep shade under fruit trees is not a scallion system.
Lab note: “Part sun” without hour counts is not a light regime. Measure.
Edaphic requirements
Loose, fertile, drained; pH ~6.0–7.0. Avoid chronic waterlogging and fresh manure (soft tissue, disease). Raised beds excel.
Irrigation protocol
Keep top 10–15 cm moist. Dry weather: ~2×/week or ~25 mm/week total; more in containers. Mulch. In rain, stop irrigating and weed.
Lab note: Crispy tips are not seasonal décor. They are under-watering or salt/stress signals—diagnose.
Nutrient management
Moderate N for continuous leaf production. Pre-plant balanced feed; light side-dress every 3–4 weeks in active harvest. Excess N + wet → soft plants and foliar disease.
Phenology — North Bend
- Sow late winter–spring; succession monthly for continuous supply.
- Late summer sow for fall/winter harvest.
- Sets/starts for speed; seed for cost efficiency and genetics diversity.
Advanced practice: cutting systems
Cut above white base for regrowth, or harvest whole plants. Hill for longer blanched stems if desired. Divide perennial bunching clumps.
Graduate extension: seed vs. sets
Sets bolt if mishandled; seed is slower but scalable. Continuous kitchen supply beats one heroic row you forget until it lignifies.
Biotic stress
Thrips, onion maggot risk, seedling slugs, fungal tip dieback in chronic wet. Rotate alliums. Do not replant into last year’s unexplained mortality and act surprised.
Harvest
Pencil thickness standard. Morning harvest; rinse grit. Storage in-garden often beats a two-week crisper death march.
Unit close
Succession · shallow-root irrigation · weed control · cut-and-regrow. Miss that and keep funding the produce aisle.