Cabbage sennen F1 Hybrid Is A Wonderful Spring Cabbage. This Is A New Frost-hardy Ball Head Cabbage That Is The Earliest Cropping Primo-type, Especially If Given A Little Fleece Protection During The Harshest Weather.excellent To Sow In Late July & August For Overwintering Crops That You Can Harvest In April, Perfect Timing For A Home-grown harvest Before Planting Up Your Summer Cabbages.cabbage sennen Is Particularly Sweet & Crisp Making It Perfect For Salads Or Coleslaw.so Sweet The Pigeons Find It Delectable Too, But With Our Protective Fleece Youll Be Able To Save The Sweet Crop For Yourself.add sennen To Sandwiches As A Tasty Equivalent To Salad Leaves, Or As A Convenient Gluten-free equivalent To A Tortilla Wrap With Tasty Fillings.