Tradescantia x andersoniana forms dense tufts of leafy stems reaching 0.6 -1meters but they seldom stay erect as they tend to lose their vertical orientation due to various influences. The worrying tendency becomes an irritating fact after a strong and windy summer storm which can completely disorder the bushy habit. In order to prevent such instances you might try staking in advance, just in case.
There are a few cultivars of spiderwort which differ not only in the colour of flowers (white, pink, purple, lavender, blue or almost red) but also in the green tones of leaves, some of them are almost pure yellow and nicely contrast with deep purple blossoms.
After a few years of growing in the same site, the well developed plants can be divided either in spring or in early autumn, and we might consider planting some of the fragments in pots or other containers to decorate balconies or patios.
Spiderwort is a must in every garden, you can believe me or not, and planting a lot of various cultivars along with daylilies (Hemerocallis), irises (Iris), globeflowers (Trollius) and meadowsweets (Filipendula), and colourful annuals can conjure up a fascinating border, attractive both for human beings and...spiders!