I planted my dill in a container right next to the fennel last year. This year, after the dill had died back, new plants began to emerge. I let them grow to see what would develop, and sure enough they weren't dill...and they weren't quite fennel. In fact the foliage colour seemed to indicate that it was a little bit different.
The bottom of each plant has a more fennel bulb look.
The taste is a confusion of both fennel and dill. A bit more fennel but less aniseed.
The texture, however, is far tougher than both fennel and dill which are much more softer.
Having learnt my lesson, I am now growing my dill far away from my fennel plants.
How to prevent cross pollination
- Plant fennel and dill as far away from each other as practically possible.
- Since both herbs grow well in pots, moving pots makes controlling their proximity easier.
- Only plants from the same family can pollinate each other, so the same applies to any other vegetable or flower in the garden.