It was warm enough to sit outside yesterday and “prick out” (i.e., transplant into bigger pots) all the spring onions and leeks I’d sown a week ago inside. Neither Allium cepa, Allium fistulosum nor Allium ampeloprasum (porrum) need cold treatment to germinate unlike many other Alliums. Of the 40 varieties I sowed, about 28 germinated (some of the seed was a few years old). I’m still searching for a spring onion that is hardy enough to sow in late summer here so that I can harvest in early summer. The best bet is one of the cultivars of Allium fistulosum used for spring onions, but most of the modern varieties, mostly bred in Japan, have lost the hardiness of the species (from Siberia).
Here’s how I sow and record perennials sowed mid-winter for stratifying. They will be left outside until they germinate in April-June, some not until 2020!
Seed from IPK Gatersleben, the German genebank (mostly for KVANN / Norwegian Seed Savers projects on perennial vegetables and the onion collection at Ringve Botanical Garden in Trondheim
Seed from Sällskapet Trädgårdsamatörerna (STA) – Swedish Garden Amateurs
54 new perennials sown, using sterilised (on the wood stove) sand mixed 50-50 with compost
My normal stratifying bench was frozen sold so that I couldn’t open it, so I’m using these old double windows to protect the pots
….and each milk carton tray has a number: 11/18 in the picture is the 11th tray in 2018. Full details are written in my 5 year garden diary for each pot in case the labels move!