Flax plants are annuals that produce large white and light blue flowers. Flax is often grown for its fiber or the high-oil content of its seeds. In your garden, a flax plant can reach 36-inches in height with slender leaves about 1-inch wide. It can grow wild without much pruning, but you may need to neaten the plant up throughout the growing season. Pruning with clean shears is the fastest way to trim up your flax plant.
Fertilize your flax plant monthly during the growing season. This encourages new growth and promotes rapid recovery from any cuts or pruning.
Use boiling water to thoroughly clean a pair of pruning shears or scissors. Make sure the blades are sharp, because dull blades make uneven cuts that can damage plants and spread disease.
Remove dead or dying leaves with pruning shears by cutting off at the base of the stem.
Snip off flowers after they're done blooming. This keeps your plant looking neat and directs the plant's energy toward making more blooms.
Thin your flax plant by removing about 1/4 of the foliage. Use your pruning shears, and snip the foliage off at the base of the stem.