Wormwood is an herbaceous perennial that should be planted as a companion plant in every herb garden. Why you may ask? Well, the answer is simple. Wormwood is a natural pest repellant. Black flea beetles, slugs and even cabbageworm butterflies will not think about entering the garden space where wormwood is growing.
While wormwood is easily found growing along the roadside in Europe, it has also found a comfortable home in USDA Plant Hardiness Zones 3 through 9.
When it comes to propagating wormwood, you have three choices. Semi-hardwood cuttings can be taken in the spring and fall with root cuttings taken in the fall. The last propagation technique is the one that we will be covering and that is seed.
Planting wormwood seed starts off with cleaning and sterilizing a flat along with digging a hole by which the flat will fit into outside. When starting wormwood seeds, the best approach is to grow them outside.
When is the best time to start wormwood seed? Since this plant is a perennial the optimum time is in the autumn.
Now that you know the time by which to start your wormwood seeds, the next step is the planting process. Fill the cleaned and sterilized flat with an all-purpose potting soil. Next water the soil until you see moisture come out the bottom of the flat. At this point, you are ready to plant your seeds. Wormwood seeds are small and require exposure to sunlight to germinate. In doing so, simply sprinkle the seeds on the soil surface. Once that is done, cover with a clear pane of glass and place the flat in its hole outside.
While the ideal temperature for this seed germination is 55 to 65 degrees Fahrenheit, it can take between two and nine weeks before green dots of growth begin to appear.
Transplant your seedling into the garden space after your local frost-free date.
Where do you place wormwood? This herbaceous perennial loves to be in full sun but can tolerate partial shade. The soil also needs to be well draining.
When it comes to room, wormwood needs at least 12 inches between plants up to 24 inches.
To keep wormwood looking its best, fertilize the plant in the spring and only mulch in the fall. Cut back the plant to encourage new growth either in the spring or autumn and divide every four years.
The silvery foliage of this plant makes it a showstopper but the true magic of this perennial is its repelling nature to garden pest. This characteristic is why this old world favorite is having a comeback in organic gardens.