Gartenkern is a digital gardening platform designed to help gardeners plan, record, and learn from their gardens across multiple seasons. It adapts to a range of growing spaces, from windowsill pots and balconies to raised beds, vegetable plots, fruit trees, and berry bushes. Gardeners can map beds, track seed inventories and harvests, document plant locations, and build a season-by-season garden history.

A multi-year planting calendar uses past records to suggest planting times and support crop rotation, while AI-powered photo recognition helps identify plant varieties, including traditional or rare varieties. Shared garden records let family members, housemates, and friends coordinate watering, planting, and harvesting across devices. The platform also provides a plant encyclopedia with variety profiles, care advice, and planting dates, as well as location-based frost warnings for Germany.

Its website is available in a browser without installation; iOS and Android apps are noted as forthcoming. Gartenkern also publishes practical gardening articles on seasonal tasks, plant care, lawn maintenance, harvesting, and food storage, and offers a directory to help users find among more than 17,000 allotment garden associations in Germany