In my experience, most people think lavender flowering is mostly down to the seasons.
Some years it can bloom beautifully. Other years, it can produce lots of healthy foliage… and hardly any flowers.
What makes the difference isn’t doing more, but rather it was doing less, and replicating the conditions of the lavender’s native Mediterranean environment where they flower so beautifully.
Over the years, through trial, error, and more than a few disappointing summers, these are the seven changes that genuinely increased lavender blooms for me, without forcing the plant or fighting its natural instincts.
1) Stop Feeding Lavender (This Made the Biggest Difference)
This is one of the most common mistakes I see. Lots of fertiliser brands often give the impression tthat he more you use their product, the more your plants are going to bloom.
The irony is that too much fertiliser results in big, lush plants with very few flowers, and it actually decreases the potency of the aroma as it reduces the concentration of the essential oils that exude the gorgeous fragrance.
Lavender evolved in nutrient-poor Mediterranean soils that are typically gritty or sandy. When it receives too much nitrogen, it prioritises leaf growth over flowering.
What to Do…
Avoid using any fertiliser at all, as this is contrary to the preferred conditions of the sandy, gritty soils of their native habitat! Avoid those bags of compost that have added fertiliser in them, as they are not good for lavenders or any Mediterranean herbs.
What I recommend instead is to use a peat-free compost with sand or grit to replicate the gritty soil in which lavenders flower best! More on this…
2) Improve Drainage (Blooms Follow Healthy Roots)
Healthy roots are the foundation of heavy flowering, because if lavender is stressed then it doesn’t flower anywhere near as well.
Suprisingly enough, Lavender roots need oxygen as much as they need water for root respiration. When soil stays damp too long, roots struggle to uptake the nutrients (and ironically) water they neeed and a stressed root system doesn’t support flowering well. This is especially important for lavender grown in pots.
What Finally Worked for Me
After experimenting with different mixes, this is what I now use consistently:
- 70% peat-free compost
- 30% horticultural grit
I tried horticultural sand early on, but found grit far superior. The larger particle size keeps air pockets open, improves drainage long-term, and prevents the soil from compacting over time. It closely mimics the rocky soils lavender grows in naturally. This also mimics the level of fertility in the soil of the lavenders home range.
Once I improved drainage, not only did flowering increase, but any drooping and browning issues largely disappeared too.
3) Water Less (But Water Properly)
This one feels counterintuitive, but it matters.
Lavender blooms best when it experiences dry periods between deep waterings. Constantly damp soil keeps the plant in “growth mode” instead of “reproductive mode.” Think of the climate of Southern rance, where lavender grows wild and commercially. It is hot and dry with occasional rainfall. This is what we should seek to mimic so that our lavender flowers more plentifully.
How I Water for Better Blooms
- I water deeply, until water drains freely from the pot. What we are aiming for here is that the soil around the lavenders root ball and the pot is evenly moist.
- Then I wait until the soil dries out completely, which is typically 10 days to 2 weeks in Summer, but use this as a rule o thumb as we should water accorrding to the needs of our lavender rather then adhere to a generic scheduale.
How do you tell if the soil is evenly moist or dry? A simple trick I use is lifting the pot:
- Heavy pot = still damp
- Light pot = time to water
This is the most reliable method I have found for ascertaining when my lavender needs water.
Keep in mind that there are factors taht can increase the rate at which the soil dries out such as:
- The size of the pot (small pots can dry out quickly)
- The material of the pot (terracotta and clay can dry quickly which is a good thing if you lve in a rainy climate as this mitigates the risk of root rot but it is something you shouuld keep in mind during hot weather.
- The hours of sunlight, temperature and rainfall. If the season has been overcast or perhaps theres been soome rainfall, you may not need to water your lavender for weeks. coversely if its been baking hot, windy and with little rainfall then you may need to waterr as offten as once per wekk.
4) Give Lavender More Sun Than You Think It Needs
Lavender doesn’t just like sun, it depends on it to flower well. More is more whe it comes to sunshine as it likes to grow in open sunny areas.
I’ve moved lavender plants from spots that received 4–5 hours of sun into areas with 7–8 hours, and the difference in bloom quantity was immediate. This is honestly the biggest most infulential factor in terms of how well you lavender blooms and also the potency o the fragrance of the foliage too.
In bright sunlight the concentration o essential oils increases in the leavess every time you brush past your lavender or a gentle breeze carries the aroma you can enjoy it.
What I Aim For
- At least 6–8 hours of direct sunlight per day.
- More sun = stronger stems + more flowers.
Lavender grown in partial shade may survive, but it rarely flowers heavily. If your plant is healthy but underperforming, sunlight is one of the first things I reassess.
5) Prune at the Right Time (This One Is Easy to Get Wrong)
I’ve accidentally reduced lavender blooms simply by pruning at the wrong moment.
Lavender forms flower buds on new growth, and cutting back at the wrong time can remove those buds before they open.
What Works for Me
There are several methods that work here but ffor best rresults I have ound that…
- After flowering: prune back up to one-third of green growth.
- Avoid heavy pruning in late spring when buds are forming.
I find some people leaves it till late Spring an cut back some of the new growth. I personally leave my lavenders alone in Spring as this is when they are putting enerrgy intoo flowering.
6) Let Lavender Be Slightly Root-Bound
This surprised me initially.
Lavender often blooms better when it’s slightly root-bound, especially in pots. Oversized containers hold too much wet soil around the roots, which encourages leafy growth at the expense of flowers.
What I Do Now
- I avoid upsizing pots unnecessarily.
- I let lavender fill its container before repotting.
- I prioritise drainage and pot material over sheer size.
When choosing a pot size for lavender the best advice is to choose a pot that is propartionate to the lavender itself. If in doubt plant lavender in a pot that is 12 inches accroess. Any smaller and thhe pot dries too quickly.
I the pot is too big the lavender diverts its enegry into growing a mre extensive root system rather then flowering.
A little root restriction seems to encourage lavender to focus on flowering rather than foliage.
7) Match Expectations to the Type of Lavender You’re Growing
This is crucial and often overlooked.
English Lavender (Lavandula angustifolia)
- Blooms once per year.
- Short but intense flowering period.
- Flowers heavily, then stops.
Popular varities include lavender “munstead” and “hidcote” which have the finest frangrence of all lavenders and they are my all time personal favourite. These typically bloom in May or june for about a month.
French & Spanish Lavender (Lavandula dentata / Lavandula stoechas)
- Bloom for longer.
- Often flower in waves.
- Can produce blooms over several months.
When I first grew different types together, I thought something was wrong with my English lavender because it stopped flowering so quickly. In reality, it was behaving exactly as it should.
French and Spanish Lavenders can flower nearly all summer in the right climate (Mediterrnaean climate) but the fragrence is less potent as these lavender are ar less cold hardy then the Enlish lavenders and they typically do not survive freezing winter temperatures.
What This Means for More Flowers
- Don’t expect continuous blooms from English lavender.
- Prune after flowering to set up next year’s display.
- Choose French or Spanish lavender if long flowering is your goal.
A Quick “More Blooms” Checklist
When I want to maximise lavender flowers, this is what I focus on:
- Full sun (6–8+ hours) (The most important factor by far)
- Lean, gritty soil (avoid fertilizer)
- Excellent drainage (ad 30% grit or sand to the soil)
- Infrequent deep watering
- Correct pruning timing
- Slight root restriction in pots
Most bloom problems trace back to one or two of these being off.
Final Thoughts: More Flowers Came When I Stopped Trying So Hard
The biggest lesson lavender taught me is that less care often leads to better results.
Once I stopped feeding, watering frequently, and trying to “help” my lavender along, flowering improved naturally. Healthy roots, lots of sun, and dry conditions did more than any fertiliser ever could.
If you want more lavender flowers, think Mediterranean, rocky soil, bright sun, and long dry spells. Lavender knows what to do when the conditions are right.