How Much Does Lavender Spread?

Lavenders are perennial shrubs which are ideal for creating fragrant ornamental hedges, plants and borders in the garden. But you might be worried that they could spread throughout your garden in the same manner as other herbs are recognized for…

The spread of lavenders is in terms of their vegetative growth The largest varieties growing to 36 to 40 inches (90 100-100 cm). The spread of lavenders is through seeds dispersing, but their rate for germination remains very low and is almost non-existent. It is possible to stop the spread of lavender by cutting off flower heads bearing seeds in the late summer.

Lavenders are not propagated by self-propagation, division or other methods aside from seeds that are dispersed from pods that develop within their flower heads that have been discarded in the late summer. (Although they can be propagated using cuttings made from gardeners).

The seeds require particular conditions for their growth, therefore they won’t appear suddenly in random areas of your garden in the same way as other plants are known to do.

The different varieties of lavender can grow to various sizes. The size of the plant is determined by the way they are taken care of and pruned every year.

Continue reading to find out the extent to which lavender spreads and the best way to stop seeds spread…

How Much do Lavenders Spread?

Lavenders need at least six hours of sunshine every day however the more sunlight they get, the better flowers.

Naturally, the distance each lavender grows in terms of its growth will determine the distance you can plant your lavenders.

Lavenders thrive when they are placed about 2-3 feet from each other. Lavenders need to be placed to allow them to enjoy the breeze (which aids in reducing fungal diseases) and also to get enough sunlight throughout the day, without shading one another.

The space between them also implies that there is less competition among plants regarding space for their root systems, and access to nutrients and water.

It is recommended pruning your lavenders into a mound at the beginning of spring and then at the end of summer to trim the flower stems that have been discarded. This helps maintain the attractive shape of the plant, reduce the growth of weaker woody plants and prevent the lavenders from spreading or getting distorted.

Lavender with Bee

The amount of lavender that will grow in terms of size and growth will differ greatly based on the variety of plants and if they receive the best care, with regard to the amount of sunlight, soil conditions as well as regular trimming.

In general the lavender plant has been divided in three distinct categories: semi-dwarf, giant and dwarf lavenders…

All Lavenders tend to grow in the same amount of size as their height. It all depends on how well the are taken care of and the amount of space they have to grow in.

The amount of sunshine particularly is a major influence on the size, health and quality of the flowers each summer . Pruning is essential to prolong the life of the lavender and keep its the shape.

If they aren’t pruned regularly will grow leggy they will produce less flowers and are more prone to damage from weather.

(If your lavender isn’t blooming, read my article to find solutions).

How to Avoid Lavenders Spreading by Seed

The spread of lavenders is through the growth of their foliage (as as with other species) as well as seed dispersal during the summer months.

Lavender plants don’t grow by self-propagation or by any other method (however they are fairly easy to propagate if you have a plan). They are able to be divided physically however this will have less success than using cuttings to spread.

The seeds of lavenders develop in seed pods which emerge from the flower heads that have been discarded in the summer’s end. If you’ve not cut off the flower heads that have been discarded throughout the entire season, you’ll be able to hear seeds rattling in the.

This is an enormous benefit in terms of managing spreading of the lavender since all seeds are within one pod of seeds which makes it easy to control by deadheading the flower before the seeds begin to develop fully.

If you let the lavender seed go to seed, it’s very unlikely that it will self-seed. Oregano is a well-known herb for self-seeding, but lavender seeds are very rare to germinate due to self-seeding. In all my years of experience working as an commercial gardener,, I haven’t observed lavender spreading in this manner, so this isn’t something to be concerned about in your garden.

The method used by gardeners to cultivate lavenders from seeds requires a number of steps , including an interval of cold, followed by warmer soil temperatures between 75o and 80oF (23.9o to 26.7oC) and, ideally, they should be heated by the soil beneath their tray.

It is highly unlikely that the sequence of steps for growing lavenders from seeds in the proper sequence will occur naturally in your garden.

It is also true it is the case that lavender hybrids tend to be seeds that are and sterile which means the sole way to grow more plants is to take cuttings to propagate.

The control of lavenders seeds dispersal is easy and seldom an issue for gardeners of all climates.

Key Takeaways

  • Lavenders are only spread through vegetation development or seeds dispersal.
  • In general, lavenders grow in size as large as they grow tall. The largest spread of lavender is 36 to 40 inches (90 100-100 cm) for species like ‘ Hidcote Giant‘.
  • The rate of germination for lavender seeds is extremely low when compared to other herbs and self-set lavender seldom a problem in the garden.
  • To stop seeds of lavender from spreading, simply cut off the heads of flowers after they’ve bloomed.
  • The size and distribution of lavenders are influenced on the quantity of sun they get, the amount of space they have and the way they are taken care of.
  • Pruning lavenders into a neat mound-like shape in the spring, and then a gentle pruning just before winter will ensure the health of the lavender and prevent it from growing and becoming excessively sagging.


Went from a bad gardener to a half-decent one over 10+ years. Super happy to share my tips and tricks with you :)