(5 Reasons) Lavender ‘Phenomenal’ is not Blooming

The most spectacular lavender usually blooms around the middle of Summer. If you deadheaded regularly, will flower until Fall.There are several motives why the lavender spectacular might not flower…

The most frequent causes of lavender phenomenal not blooming is due to fertilizers or the plant being planted in soil that is rich in nutrients. The lavender phenomenal can be found in medium to low, sandy soils. The addition of fertilizer can result in the growth of lavender-producing foliage but at the expense of flowers.

Take into consideration that lavenders of all kinds typically blooms at its peak one year after it was planted because it has more time to adapt to its new environment.

Continue reading to find the most frequent reasons why lavender phenomenal isn’t blooming, and the best way to fix the issue…

1. Do not add fertilizer.

The main reason that causes the lavender to not blossom to its fullest potential is due to the addition of fertilizer or compost from a store which has been enhanced with nutrients.

The Lavender spectacular is mix that combines English as well as French lavenders Both originate from the South of Europe. In their natural habitat, these lavenders thrive on soils that are sandy and low in nutrients..

The lavender is specially designed to thrive in these conditions and in fact does not like fertilizers added to it. The result of feeding lavender phenomenal is the plant producing a leggy growth , with only a few flowers.

What do you do…Avoid feeding the lavender in the future, and it could be beneficial to plant the lavender in new soil if it’s placed in a pot or container. Cut back the growth that is leggy in the fall (avoid cutting too close to the base of the woody).

Lavenders thrive in the absence of terms of soil nutrients as well as watering.

The most effective way to stimulate the bloom of lavender is to try to recreate some of the growing circumstances in the Mediterranean in which lavender flourishes, such as low soil, full sun and frequent watering.

If the leaves turn yellow, it is a sign that there is too much nitrogen to meet the requirements of lavender. If there isn’t any fertilizer applied to the lavender, the plant could rebound and put on a more robust bloom in the following year’s.

2. Avoid Nutrient Rich Soil

The same reason that lavender doesn’t require any an additional fertilizer, they also dislike soil that is overly high in nutrients. The soil that is rich in nutrients encourages the growth of the plant and less blooms to show.

Lavenders are low-maintenance plants that thrive in medium to low fertility soils, which they have become accustomed to within their natural Southern European range.

The process of replicating these conditions for your lavender phenomenal is a breeze for containers and pots since you are in direct control of the soil’s profile.

The ideal potting mix for amazing results is just about 1/3 horticultural sand , or grit, and 2/3 of potting compost. (Read this article and find out about the best soil mix for the potting of lavenders).

The proportion of sand in this area is comparable to the soil that is their home area in the coastal regions in the Mediterranean.

Sand and grit will not hold nutrients, which can affect soil fertility, resulting in the medium to low dirt profile which lavenders like that will stimulate the plant to create more flowers.

Sand and grit ensure drainage of the soil rapidly which is crucial for lavenders since dry soil is essential for their health as roots.

Lavenders in a sunny area of your garden that receives little irrigation and sandy soil will give the strongest scents from the leaves (because they have a higher amount in oils) and also the largest number of flowers.

3. Lavender Phenomenal not in Enough Sun

The most crucial factor that makes lavender spectacular for display flowers is how much direct sun it gets.

All varieties of lavender prefer full-sun. The more sunlight the lavender gets, the more intense the scent and the more blooms it produces.

Lavender don’t thrive in shade, and they often show less flowers, with larger spindly growth.

For Phenomenal that is planted in pots or containers Move the plant to an area that receives at least six hours of sunlight every day.

If your lavender is growing in an elevated bed or garden boarder , I suggest moving it to an area or pot in the garden that is more sunny. Alternately, you can trim the canopy that hangs over it and other plant that could have shade over the lavender.

Other possible causes

The amount of sun and the fact that Phenomenal is placed in the correct soil are the most likely causes for why the lavender isn’t blooming.

But, less blooms may be an indication of stress due to other causes…

4. Soil pH

Lavender Phenomenal is a tough lavender that has the characteristics of the robust English lavender plant. But, Phenomenal can tolerate mild soil acidity, but it prefers soils that are alkaline or pH neutral (lavender phenomenal thrives in soils ranging from that range from pH 6.5 up to pH 8.).

If the lavender is showing weak spindly growth, little fragrance, or the foliage is brown or yellow, the lavender could be growing in soil that is acidic.

If your garden soil is acidic, it’s possible to amend the soil using wood ash or lime to raise the pH of the soil so that it’s alkaline and thus suitable for growing lavender however, this may require some time and effort because the soil may return to its initial acidic condition over time.

(Read my article to learn more about soil pH measurement as well as lavenders in soil that is acidic).

The best option is to move the lavender into containers or pots. The pH of the soil in the container or pot is much more adaptable by using just one tablespoon of lime from the agricultural sector and half of a cup of wood Ash (which is the alkaline pH).

5. Heavy Handed Pruning

Lavender phenomenal needs pruning every year to keep its shape and extend its lifespan. One of the main advantages of cutting is the fact that it slows the amount that the base of the plant expands.

The base of the woody lavender is generally not able to support the growth of new plants and is more susceptible to split. The lavender will only display its flowers on new growth, hence it is important to prune the lavender to limit the development of the woody base.

Prune the lavender every year, either in Autumn or Spring. Cut back only the upper 1/3 of the flexible growth, making sure to not cut the base of the plant.

Pruning the lavender in the right quantity will encourage the development of new stems that will support the blooms of this season.


Lavender phenomenal can be well-adapted to dry, breezey conditions that have little rain.

The lavender that is adaptable can be tolerant of climates that have higher rainfall, provided that the soil is altered with enough sand to improve drainage.

Commercial lavender growers experience the greatest flowers (and greater oils) during dry seasons with a comparatively low number of days of rain or overcast.

Over-watering lavender can cause stress on the plant, and can create conditions that increase the risk of fungal disease root rot.

The lavenders that have root rot exhibit the appearance of a look of drooping and yellow or brown foliage. It can also affect the flowers of the lavender, and could result in the loss of lavender if it’s constantly overwatered.

Once Phenomenal is established following the first season, it usually doesn’t require watering, even in the summer. If there is an absence of rain for two weeks , should you be sure to water your lavender, and even then, it’s extremely drought-resistant.

(For more details on watering and information best practices for different conditions, check out my article on how often do you water your the lavender plant).

If your garden soil is dripping slow, then I suggest planting lavenders in containers or pots as they provide better drainage conditions. You can easily alter the mix of potting soil with sand to increase the drainage.

The roots will remain somewhat dry, thereby reducing the possibility of root rot, resulting in an enviable plant that has an attractive bloom during the summer.

(Read the article I wrote to find out more about selecting the best pot to grow lavender in.).

Key Takeaways:

  • Utilizing fertilizers or rich in nutrients soil may cause lavender to develop foliage, but with the loss of flowers.
  • The sun’s rays are one of the main factors that make the lavender to blossom in a spectacular way. Plant lavender in full sunlight to get the best results.
  • Lavender phenomenal can grow in soils that are slightly acidic (pH 6.5) however, it prefers to grow in acidic soils (up up to pH 8.). The lavender in soils that are too acidic may exhibit signs of stress, like not blooming. Re-seed the soil with wood ash or horticultural lime to alkaline soils that are suitable for lavender.
  • Pruning vigorously back to the base of the woody plant can limit the amount of growth that supports the flowers. Pruning lavender is only necessary one time per day, trimming back the growth that is flexible.
  • Slow draining or overwatering soils may cause pathogen root rot that can result in a lavender which shows signs of stress , such as an appearance of drooping and absence of flowers. Make sure that the soil drains well and amend it with horticultural sand or grit, if needed, to increase drainage. The lavender plants don’t require regular irrigation and prefer dry conditions that are similar to the conditions they are used to that is found in the coastal regions of Southern Europe.


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