How to Propagate Sisymbrium strictissimum

From Seed to Success: Propagating the “Sisymbrium strictissimum”

You might know it as Turkish rocket, or Tall Mustard – Sisymbrium strictissimum is a fast-growing, hardy annual that adds a burst of color and vertical interest to your garden. But what if you want more than just a few plants? Enter the world of propagation!

This guide will walk you step-by-step through the art of growing Sisymbrium strictissimum using a variety of methods, allowing you to expand your garden and share the beauty of this fascinating plant.

A Seedling Saga: The Easy Way to Grow

The easiest path to propagation is through seeds. Sisymbrium strictissimum is a prolific seeder, often self-sowing in gardens where it’s established. You can collect seeds from the mature seed pods, which are narrow and cylindrical, turning brown as they mature.

Here’s how to sow your seeds:

  • Timing is Everything: Sow your seeds directly outdoors in early spring or late autumn. This gives them a head start in cooler conditions.
  • Preparing the Ground: Choose a sunny spot with well-drained soil. A little compost or aged manure will boost the health and vigor of your seedlings.
  • Sowing: Scatter seeds thinly on the soil surface. Press them gently into the ground, but don’t cover them too deeply – just a fine layer of soil is sufficient.
  • Keep it Moist: Keep the soil consistently damp until seedlings emerge. This usually takes a couple of weeks.

When to Thin: Once your Sisymbrium strictissimum seedlings have a few true leaves, it’s time to thin them out. Thin the strongest seedlings to allow them to grow to their full potential.

Another Option: Division

For a quicker method, consider dividing mature plants. This works best in spring or autumn when the plant isn’t actively growing. Carefully dig up the plant and divide the root ball into sections, ensuring each piece has healthy roots and foliage. Replant the divisions immediately in moist soil.

A Word of Caution: While Sisymbrium strictissimum is a beautiful addition to gardens and can be a valuable source of nectar for pollinating insects, it can also become invasive if not managed carefully. It’s essential to monitor its growth and remove unwanted plants before they set seed.

Let the Seeds Fly:

Ultimately, propagating Sisymbrium strictissimum is a rewarding way to enjoy its beauty in your garden. Whether you choose the traditional method of sowing seeds or the more immediate approach of division, you’ll be able to share this captivating plant and watch it thrive in your garden.