KullGames.Arboretum

a real four-seasons botanical phenology sim — real species, real day-length, real thermal-time (GDD) forcing

Date (Jan 1, 1999 · day 1)

Season

Playback

Site (fixed — single real location)

📍 Boston, Massachusetts, USA · 42.4°N

Site USDA hardiness zone

Sky

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Selected plant

Click any plant in the bed for its trait readout.

Phenophase key

Single real site: 📍 Boston, Massachusetts, USA (42.36°N) — sim clock is a real Gregorian calendar starting 1999-01-01. Real species & traits from OnlyCSharp.Data/1.9/Catalogs.Biology.Botany (PlantTraitsCatalog, ConiferCatalog, WildflowerCatalog, VineCatalog, RoseCatalog, PalmCatalog — every row links a Wikipedia article). Day length: solar-declination (Cooper 1969, Solar Energy 12(3):333–346) approximation, δ = 23.44°·sin(360/365·(day+284)), daylength = (2/15)·acos(−tan(lat)·tan(δ)). Budburst-forcing / thermal-time: Reaumur growing-degree-day concept via Cannell & Smith (1983, J. Applied Ecology 20:951–963); hardiness-linked forcing gradient: Vitasse et al. (2009, Agric. Forest Meteorol. 149:735–744). Photoperiod-triggered senescence: Delpierre et al. (2009, Agric. Forest Meteorol. 149:938–948).