Sowing or planting by the moon calendar is a centuries-old tradition — many swear by it, others call it superstition. Where does the truth lie? In this article we take a balanced look at what science says, what tradition says, and how to use it sensibly in your garden.
The origin and logic of the moon calendar
The moon calendar starts from the observation that lunar cycles affect the Earth — most visibly in the tides. By tradition, during the ascending moon sap flows to the upper part of the plant (good for leafy crops), and during the descending moon toward the root (good for root vegetables). The moon phases also play a role.
What does science say?
Honesty matters here. Most rigorous, controlled studies have found NO clear, repeatable evidence that the moon phase alone significantly affects yield. The Moon’s gravitational effect on a small garden bed is negligible compared with the tides. Some studies found weak links between moonlight and seed germination — but these are not convincing.
What does tradition and practice say?
Tradition, however, is centuries of experience passed down through generations. Many practising gardeners — including followers of biodynamic farming (Maria Thun’s calendar) — report consistent results. This may be placebo, the effect of increased attention, or a real mechanism not yet understood. Experience should not be dismissed.
The balance: framework, not dogma
The most sensible approach: use the moon calendar as a useful framework that gives rhythm and attention to gardening — but not as a dogma that makes you miss good weather. If the moon-calendar day coincides with a frosty night, the weather ALWAYS overrides the moon.
- 🌱 Use it as rhythm and reminder
- 🌡️ But weather and soil temperature take priority
- 🧪 Experiment: observe in YOUR garden
How does the app integrate the moon calendar?
BioGarden365 shows the moon calendar not on its own but IN HARMONY with your personal sowing calendar. So you see the moon phase and the traditional recommendation — but always adapted to your climate and weather. The decision is yours, the full picture in your hands.
Summary
The scientific evidence for moon gardening is weak, but tradition and practical experience are a real value. The best approach is balanced: use it as a useful framework, but let weather and soil decide in disputed cases. BioGarden365 shows both — you decide what to follow.