Does Lavatera Self Seed. Grass and wildflowers and plants that are meant to grow somewhat wild are fine as self seeders but in my experience they rarely get it completely right without needing a bit of extra seed added every couple of years. Perennials perennial plants prone to reseeding in the garden include columbine violets and coneflowers.
I counted over 25 different kinds of self-seeding plants. Sow seeds directly into your flower garden after all danger of frost has past. The Royal Horticultural Society has given it the Award of Garden Merit AGM.
Maybe the conditions just werent right.
25022019 Lavatera maritima also known as the tree mallow is a fast-growing medium-sized semi-evergreen shrub. Grass growing in dry conditions is less likely to spread out. Both 4 oclocks and cat whiskers are considered tender perennials hardy only in zones 9-11 so most of us grow them as annuals. With a bit of light management each generation can be coaxed into providing seeds season after season.