Mitsuba self-sows in Wellington

The excellent Japanese perennial vegetable Mitsuba (Cryptotaenia japonica) self-sows in my Wellington, NZ, garden. It self-sows in full sun or full shade, much larger leaves in the shade. Self-sowing in moist soil or even on relatively dry slopes.

 Another Asian vegetable that self-sows here is the annual or biennial Water Pepper (Persicaria hydropiper) which has an interesting hot after-taste. So far only self-sowing in shallow water or moist sunny spots. Less productive and tasty than Mitsuba in my experience.