What can be sown directly outdoors in April?

{"list_position":161,"systype":"article","name":"Wrinkled Pea 'Kelvedon Wonder' (Pisum sativum L. convar. medullare)","id":"MA-1030","list_name":"tree-139"}

{"list_position":162,"systype":"article","name":"May turnip 'Platte Witte Mei' (Brassica rapa subsp. rapa var. majalis)","id":"MA-1029","list_name":"tree-139"}

{"list_position":163,"systype":"article","name":"Linseed / Flax (Linum usitatissimum)","id":"MA-1028","list_name":"tree-139"}

{"list_position":164,"systype":"article","name":"Caraway (Carum carvi)","id":"MA-1025","list_name":"tree-139"}

{"list_position":165,"systype":"article","name":"White Kohlrabi 'Superschmelz' (Brassica oleracea var. gongylodes)","id":"MA-1022","list_name":"tree-139"}

{"list_position":166,"systype":"article","name":"Purple Kohlrabi 'Blauer Delikatess' (Brassica oleracea var. gongylodes)","id":"MA-1021","list_name":"tree-139"}

{"list_position":167,"systype":"article","name":"Flat-Leaved Chervil (Anthriscus cerefolium)","id":"MA-1020","list_name":"tree-139"}

{"list_position":168,"systype":"article","name":"Garden Nasturtium / Monks Cress (Tropaeolum majus)","id":"MA-1019","list_name":"tree-139"}

{"list_position":169,"systype":"article","name":"Great burnet (Sanguisorba officinalis)","id":"MA-1016","list_name":"tree-139"}

{"list_position":170,"systype":"article","name":"Garden Sorrel (Rumex acetosa)","id":"MA-1015","list_name":"tree-139"}

{"list_position":171,"systype":"article","name":"Lawn Daisy (Bellis perennis)","id":"MA-1014","list_name":"tree-139"}

{"list_position":172,"systype":"article","name":"Borage (Borago officinalis)","id":"MA-1005","list_name":"tree-139"}

{"list_position":173,"systype":"article","name":"Bloody dock, red veined sorrel (Rumex sanguineus)","id":"MA-1003","list_name":"tree-139"}

{"list_position":174,"systype":"article","name":"Cauliflower 'Neckar Pearl' (Brassica oleracea var. botrytis)","id":"MA-1002","list_name":"tree-139"}

{"list_position":175,"systype":"article","name":"German Green Top Swede/ Rutabaga 'Gelbe Wilhelmsburger' (Brassica napus)","id":"MA-0121","list_name":"tree-139"}

{"list_position":176,"systype":"article","name":"Einkorn Wheat (Triticum monococcum)","id":"MA-0115","list_name":"tree-139"}

{"list_position":177,"systype":"article","name":"Filderkraut cabbage (Brassica oleracea)","id":"MA-0113","list_name":"tree-139"}

{"list_position":178,"systype":"article","name":"Turnip 'Teltower Rübchen' (Brassica rapa var. teltowiensis)","id":"MA-0112","list_name":"tree-139"}