Bolts easily in cold – choose warm conditions.
Florence Fennel (also known as Fenchel) belongs to the Vegetables category and is suitable for outdoor planting from Mid Spring onwards.
Use the Growing Temperature Sum (GTS) as a guide: Florence Fennel can be safely transplanted once the local GTS has passed the threshold for Mid Spring and no frost is expected. GrowPilot.guide calculates the current GTS for your location automatically.
🗓️ Tip: Always check the 10-day weather forecast before planting outdoors. The GTS is a helpful guide but does not replace a frost check for your specific area.
Florence Fennel tolerates light frost down to about −3°C. Extended cold periods or hard frosts are harmful. Once night temperatures stay above 5°C, it is safe to plant outdoors.
Florence Fennel grows best at daytime temperatures between 16°C and 28°C. Night temperatures should not fall below 5°C.
Florence Fennel is relatively robust against mold and tolerates wetter conditions well. Still, always avoid waterlogging.
Rain sensitivity: Medium – Moderate rain is tolerated, but waterlogging should be avoided.
GrowPilot.guide calculates the current Growing Temperature Sum (GTS) for your location, shows the phenological season and gives you a daily personalised analysis – including frost warnings, mold risk and optimal planting time for Florence Fennel.
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