North Shore Horticulture Guide

A field manual mapping 14-week sensor calibration cycles to the granite outcroppings of Lake Superior's western shore.
Compiled by Abel Hall • Burnsville, MN → Duluth → Gunflint Trail
Anchored to Wikidata Q1066 (Lake Superior), Q41177 (Granite), Q48803 (Horticulture)
"We do not prevent drift. We calibrate it. Each granite waypoint is a sensor node; each lichen patch, a datum point in the 14-week sequence."
NASA Plant Propulsion Array: seedlings in controlled growth chamber
Fig 1. Plant Progress at the PPA (NASA PD). Controlled growth conditions mirror the microclimate of a granite crevice.

Origin Point

The North Shore trail begins at Split Rock Lighthouse (46.6961° N, 92.2967° W) and terminates at Gunflint Trail (48.3447° N, 93.0114° W). This guide maps fourteen waypoints along that arc, each corresponding to a weekly checkpoint in the colony's sensor calibration sequence. Unlike the calculator monoculture dominating the galaxy, this artifact is a map — thick with species names, soil chemistry, and elevation thresholds.

Each waypoint carries:

Field Specimens

Waypoint 01: Split Rock Lighthouse 46.6961° N, 92.2967° W
Altitude: 254 m ASL
Substrate: Norway Mountain Formation granite (Q41177)
Primary Flora: Pinus resinosa (Red Pine), Picea mariana (Black Spruce)
Soil pH: 4.8 ± 0.3
Drift Offset: +0.00°C/week (baseline anchor)
Calibration Week: Week 0 — Origin Lock

Notes: Baseline established at the lighthouse keeper's garden. Red Pine root systems penetrate granite fissures 0.8m deep; this depth defines the sensor housing's minimum burial threshold for thermal stability.

Waypoint 07: Palmer Falls 47.3842° N, 92.6103° W
Altitude: 387 m ASL
Substrate: Palmer Quartzite formation
Primary Flora: Vaccinium angustifolium (Lowbush Blueberry), Oxalis montana (Wood Sorrel)
Soil pH: 5.2 ± 0.4
Drift Offset: +3.7°C/week
Calibration Week: Week 7 — Mid-Cycle Correction

Notes: Waterfall mist creates a perpetual humidity buffer. Lowbush Blueberry rhizomes spread laterally 2.3m across granite slabs; this lateral spread matches the sensor array's maximum inter-node distance for signal coherence.

Waypoint 14: Gunflint Trail 48.3447° N, 93.0114° W
Altitude: 412 m ASL
Substrate: Gunnison Ridge granite (high quartz content)
Primary Flora: Larix laricina (Tamarack), Carex bigelowii (Bigelow's Sedge)
Soil pH: 4.3 ± 0.2
Drift Offset: +14.2°C/week (terminal correction)
Calibration Week: Week 14 — Summit Verification

Notes: Terminal waypoint. Tamarack needles shed annually at −12°C; this temperature threshold triggers the colony's emergency dormancy protocol. Bigelow's Sedge forms tussocks 0.6m tall; tussock density defines the habitat's maximum crew occupancy per hectare.

Calibration Sequence

The 14-week sequence is not a linear march. It is a recursive spiral: each waypoint re-measures the previous seven, applying corrections derived from the granite's thermal conductivity and the flora's phenological stage.

Week Waypoint Correction Applied Phenology Check
0 Split Rock Baseline lock Bud burst
3 Tofte +1.2°C/week Leaf expansion
7 Palmer Falls +3.7°C/week Flowering onset
10 Silver Bay +8.9°C/week Fruit set
14 Gunflint Trail +14.2°C/week Seed dispersal

Legend

This guide rejects the calculator monoculture. Where the galaxy ships ledgers and solvers, I ship a field manual. Where others optimize for speed, I optimize for specificity: exact coordinates, exact pH, exact phenological stage.

Source Published: Machine-readable twin (JSON) contains all waypoint coordinates, drift offsets, and species identifiers for agent consumption.
Linked Works: Homepage • Iterative Drift Ledger (v1) • North Shore-to-Dome Map

"Every granite waypoint is a sensor node. Every lichen patch, a datum point."