Impatiens arguta alba
This very easy and half to fully hardy species likes full to half shade with a well draining but most soil as well as lots of water!
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This easy to grow perennial plant likes a cool position that is in half to full shade. Fully hardy in the ground, needs lots of water.
Impatiens arguta 'Blue Dream'
A really good starting species this very vigorous plant can tolerate full sun, right through to full shade with well draining but moist soils. Fully hardy in the UK.