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Puget Sound Region
In-depth profiles, disease diagnostics, spray windows, and care schedules calibrated to this climate, this soil, and this growing season.
Featured Guide
Nurse stumps and nurse logs are the primary way old-growth forests regenerate in the Pacific Northwest. Learn how decomposing wood grows new trees, what stilt roots and colonnades reveal about forest history, and how to bring the same ecology into your garden.
The internal architecture of a broad leaf: epidermis and cuticle, palisade and spongy mesophyll, chloroplasts, stomata and guard cells, transpiration, antitranspirants, and the controlled shutdown of abscission.
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Most leaf spots on established plants are cosmetic. Learn to tell the difference between harmless spotting and the few leaf spot diseases that actually threaten plant health in the Puget Sound lowlands.
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The internal architecture of conifer needles and awl leaves: thick cuticle, sunken stomata, compact mesophyll, and the water-conservation engineering that lets conifers photosynthesize through a Puget Sound winter.
Read more →Profile updates driven by guide research and source monitoring
Spotted Lanternfly, Alder Rust, Scab, and 2 more profiles updated with damage descriptions, overwintering location, causal agent identification, and 13 more areas from OSU Extension - How to manage apple scab during..., OSU Extension - SLF forecast model impact page, OSU Extension - Vaughn Walton, OSU Extension..., and 3 other sources.
OSU Extension - How to manage apple scab during..., OSU Extension - SLF forecast model impact page, OSU Extension - Vaughn Walton, OSU Extension..., and 3 other sources
6 disease profiles enriched with regional notes and chemical control options from Alabama Extension, Morton Arboretum, NC State Extension, and 6 other sources.
Alabama Extension, Morton Arboretum, NC State Extension, and 6 other sources
Read the guide →Slug enriched with identification details, host range, lifecycle stages, and 5 more areas from Cornell Biocontrol, Cornell IPM, Edwards et al. 2009, and 14 other sources.
Cornell Biocontrol, Cornell IPM, Edwards et al. 2009, and 14 other sources
Garlic Mustard enriched with regional notes.
Scab profile updated with new regional notes from OSU Extension: 'How to manage apple scab during...
OSU Extension: 'How to manage apple scab during...
Iron Chlorosis enriched with trigger threshold (pH >7 VERIFY flag) and regional notes from NC State Extension Gardener Handbook Ch 1, UC IPM, and UC IPM pH Problems.
NC State Extension Gardener Handbook Ch 1, UC IPM, and UC IPM pH Problems
Read the guide →Powdery Mildew enriched with causal agent identification, causal agent by host, host range, and 2 more areas from Cornell PDDC, PNW Plant Disease Management Handbook, UC Davis IPM, and 3 other sources.
Cornell PDDC, PNW Plant Disease Management Handbook, UC Davis IPM, and 3 other sources
Ground Beetles (Carabidae) enriched with target pest species, pest profile links, native status, and 4 more areas from Ahn et al. 2012 (ZooKeys 147:497-543), Ahn et al. 2012 on Nebria brevicollis establishment, OSU EM 9301 (Reich et al. 2021), and 5 other sources.
Ahn et al. 2012 (ZooKeys 147:497-543), Ahn et al. 2012 on Nebria brevicollis establishment, OSU EM 9301 (Reich et al. 2021), and 5 other sources
Read the guide →10 plant profiles enriched with regional notes, cultivar data, soil drainage preferences, and 9 more areas from Briggs Nursery, USPP database, OSU Landscape Plants, Pacific Horticulture, Pacific Horticulture community planting framework, and 13 other sources.
Briggs Nursery, USPP database, OSU Landscape Plants, Pacific Horticulture, Pacific Horticulture community planting framework, and 13 other sources
Read the guide →Common Fig enriched with cultivar data, regional notes, cultural practices, and disease susceptibility from Cloud Mountain Farm Center, Gardener's Path, Gardener's Path, Gardener's Path, Cloud Mountain Farm Center, and 7 other sources.
Cloud Mountain Farm Center, Gardener's Path, Gardener's Path, Gardener's Path, Cloud Mountain Farm Center, and 7 other sources
Fig Mosaic Disease enriched with infection conditions, cultural management practices, and vulnerability timing from PNW Plant Disease Management Handbook, Wikipedia,... and Wikipedia (Fig mosaic virus) - vectored by Aceria...
PNW Plant Disease Management Handbook, Wikipedia,... and Wikipedia (Fig mosaic virus) - vectored by Aceria...
Mason Bees (Osmia lignaria) enriched with regional notes and related beneficial organisms from OSU Extension Pollination Podcast Episode 214 and WSU HortSense.
OSU Extension Pollination Podcast Episode 214 and WSU HortSense
Read the guide →Seasonal scouting notes, spray timing updates, and the regional detail that national guides leave out. Written for Western Washington gardeners and landscape professionals.
Seasonal scouting notes, timing updates, and the regional detail that national guides leave out. Delivered when it matters.
Species selection, siting, and care for this climate.
Identification, timing, and management grounded in regional extension data.
Scouting, thresholds, and IPM for the pests that actually matter here.
A growing dataset of plants, diseases, and pests tracked for this region. Profiles deepen continuously as site data, phenology, GDD timing, and cultivar performance are verified from extension research and field observation.
Written by Chris Welch. Every recommendation on this site comes from someone who works with these plants in this climate, not a content team repackaging national data.
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