Swede and Sprouts just not growing
i am struggling with my winter veg. My sprouts are tiny abd do t seem to be growing and my swede are the same, healthy enough plants but no actual swede. Could I have planted bit too late or is it lack of water or nutrient deficiency,? My soil is quite sandy, low in potassium but I have been trying to improve it with potash and ash from our log burner. Feeling a bit disheartened as they have both been in the ground since the summer and they are pretty much a write off. Would like to know what to do differently next year.