Greenhouse Thermometer and Humidity Data Logger
TempPro TempAir Bluetooth Thermometer Hygrometer
Helps a plant enthusiast spot conditions that may be stressing their collection.
GardenersScience Nerds
Garden Soil Testing Kit
~$18 typical price
Luster Leaf Rapitest Soil Test Kit
A home kit for checking common soil conditions before planting.
Why it makes a great gift
Helps a detail-minded gardener make better-informed choices for each bed.
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Compost Thermometer
Shows whether a heap is actually working, which is oddly satisfying for anyone who takes compost seriously.
GardenersScience Nerds
Grow Your Own Mushroom Kit
Back to the Roots Oyster Mushroom Kit
Weird, fun and delicious.
GardenersHome Cooks
Desktop Weather Station with Outdoor Sensor
La Crosse Technology Advanced Weather Station
A satisfying daily readout for curious people, gardeners and weather watchers.
Science NerdsHomebodies