I'd like to grow some spring forageables, but I'm lacking leeks to craft a 10-pack of seeds. Everything else I've got lots. I've been looking for 11 in-game days and I can't find any. Is there some way to obtain more leeks other than random chance of them appearing on the road?
The Horseradish, when put in the Seedmaker, will produce Spring-seeds.
Besides foraging and the spring seed group, you can also acquire and plant mixed seeds, which mature into a random seasonally-appropriate plant.