Growli by the numbers
The most fact-checked plant database on the internet
Every care guide, toxicity verdict and hardiness rating is grounded in ASPCA, USDA, RHS and university Extension sources. These numbers are what we’ve built — and what we stand behind.
10,153+
Plant species in the care library
Every species carries care, light, water, soil, hardiness and toxicity data.
10,153
ASPCA-grounded pet-safety verdicts
2,653 toxic · 3,145 mildly toxic · 4,355 pet-safe — a genus-level safety gate runs before any record ships.
10,153
Species with USDA + RHS hardiness
Minimum survivable temperature from USDA zones and RHS H1a–H7 ratings, in °C and °F.
70,000+
Indexed plant-care pages
Across 14 spoke types: care, watering, light, soil, hardiness, size, feeding, repotting, propagation, problems, pruning, pests, pet-safety and genus hubs.
6
Original data studies
Free to cite with attribution — every finding grounded in ASPCA, USDA and RHS primary data.
6
Open CC-BY datasets
Downloadable as CSV and JSON — hardiness zones, RHS ratings, toxicity, companion planting, frost data and crop spacing.
How we verify every claim
ASPCA for pet safety. Before any toxicity verdict goes live it passes a genus-level safety gate that cross-checks the ASPCA Toxic and Non-Toxic Plants database. Where the ASPCA lists a genus (for example Begonia spp.) we apply that verdict across the species in that genus — consistent with how the ASPCA frames genus-wide toxicity. Where only a representative species is listed, we extend the verdict only when the underlying plant chemistry is well documented. Every wave of new species gets a post-ship ASPCA spot-check.
USDA and RHS for hardiness.Cold-hardiness ratings are derived from the USDA Plant Hardiness Zone Map and the Royal Horticultural Society’s published H1a–H7 scale, not from training data. Minimum survivable temperatures are given in both °C and °F per species.
University Extension and RHS for care. Watering frequency, soil type, light requirements and feeding schedules are cross-checked against UK RHS guidance and US university Extension publications.
No invented statistics.Where a source cannot confirm a specific number, the copy hedges (“typically”, “in many regions”). Specific claims — cultivar names, study citations, regulatory facts — are web-verified before shipping. See the full methodology.
Why press and researchers cite Growli
Growli publishes original data studies under CC-BY 4.0 — free to quote, embed and chart. Each study cross-tabulates the full species corpus against primary-source data rather than a convenience sample. The toxicity report, for instance, analysed every catalogued species against the ASPCA database — not just the 15 or 20 plants usually discussed in gardening coverage.