Mullein is one of those plants that seems simple until you actually grow it.

It is usually described as a biennial herb. In a textbook explanation, that means it grows a soft leafy rosette in its first year, then sends up its tall flowering spike in the second year.

And in many climates, that is exactly what happens.

But plants do not always behave neatly in every region.

Here in the Snowy Mountains of NSW, our growing conditions are very different from the mild, predictable climates often used in general gardening guides. We get proper cold. We get snow. We get winter die-back. Then, when the warmer weather returns, growth can come on quickly.

Because of that, our mullein does not always follow the classic “first year leaves, second year flowers” pattern. In our region, we can see mullein grow, flower, die back through winter, and then push new growth again when the season shifts. Some plants can even appear to move through growth stages much faster than expected.

That is why I am always careful when people speak in absolutes about herbs.

Mullein is generally classed as a biennial, but that does not mean it behaves exactly the same in every climate, every season, or every patch of soil.

Plants respond to where they are growing.

They respond to cold, heat, rainfall, stress, soil, altitude and seasonal timing.

The textbook gives the general rule.
Your own land shows you the plant’s real behaviour.

Growing Mullein at Altitude

Mullein is a hardy, striking plant with soft grey-green leaves and tall yellow flower spikes. It has a very distinctive look in the garden, especially against alpine grasses, gum trees and rocky soil.

In our Snowy Mountains climate, it has to handle a lot. Summer can bring strong sun and dry conditions, while winter brings frost, snow and die-back. That seasonal contrast seems to influence how the plant grows here.

Rather than treating mullein as a plant with one strict timeline, we watch what it is actually doing.

Is it putting energy into leaves?
Is it sending up a flower spike?
Has it died back after snow?
Is it pushing fresh growth again?

That observation matters more than a rule written for a different climate.

How Mullein Is Traditionally Used

Mullein has a long history as a home apothecary herb, especially in European and folk herbal traditions.

To keep things clear, this is not medical advice and it is not a claim that mullein treats, cures or prevents any condition. This is simply how mullein has traditionally been prepared and used as a botanical herb.

1. As a Herbal Tea

Dried mullein leaf can be prepared as a simple herbal tea.

Because the leaves are naturally soft and fuzzy, it is important to strain the tea very well before drinking. A fine tea strainer, cloth filter or compostable tea bag works best so the tiny leaf hairs are removed from the finished cup.

Mullein tea has a mild, earthy, slightly grassy flavour. It blends well with herbs like peppermint, lemon balm, elderflower or chamomile, depending on the style of tea you want to create.

A simple blend idea:

Mullein leaf + peppermint + elderflower

This gives a soft, alpine-style herbal cup with a fresh but gentle flavour.

2. As an Oil Infusion

Mullein flowers are also traditionally infused into oil for external use.

This is a beautiful way to capture the plant as part of a slow apothecary process. The dried flowers are placed into a suitable carrier oil and left to infuse before being strained.

For product-making, this kind of infused oil can be used as a botanical ingredient in balms, salves or body oils, depending on the formula.

The safe wording here is important. Rather than saying the oil “treats” something, it is better to describe it as:

A traditional botanical oil infusion for external body care.

3. As a Bath or Foot Soak Herb

Dried mullein leaf can also be used as part of a botanical bath or foot soak blend.

Because of the soft leaf texture, it is best placed inside a muslin bag, tea bag or bath sachet rather than sprinkled loose in the water.

It pairs well with calming, gentle-feeling herbs such as calendula, chamomile, lavender or marshmallow root.

A simple bath sachet idea:

Mullein leaf + calendula + chamomile

This creates a soft botanical bath ritual without making any therapeutic claims.

4. As a Display Herb in a Home Apothecary

Mullein is one of those herbs that looks beautiful in a home apothecary jar. The leaves have a soft, silvery-green colour and the flowers bring a bright yellow note.

For people building a simple herbal shelf, mullein is a lovely herb to include because it is visually distinctive and has a strong traditional apothecary identity.

It is a good example of why herbs are not just ingredients. They are seasonal plants with their own growth patterns, textures, colours and stories.

Harvesting With Observation, Not Assumption

One of the biggest lessons from growing mullein is that local observation matters.

It is easy to repeat a rule like “mullein only flowers in its second year,” but that does not always match what happens on the ground.

In a snowy alpine region, the plant may grow, flower, die back and return in ways that do not match the neat biennial explanation.

That does not mean the textbook is wrong.

It means nature is more flexible than the textbook.

The best approach is to learn the plant where you live. Watch when it emerges. Watch how it responds to winter. Watch when it flowers. Watch whether it regrows after die-back.

That is the difference between simply reading about herbs and actually growing them.

A Note on Safe Use

When preparing mullein leaf as tea, always strain it well to remove the fine leaf hairs.

Use clean, correctly dried plant material and store it in a dry, airtight container away from heat and moisture.

If you are pregnant, breastfeeding, taking medication, managing a health condition, or preparing herbs for children, it is best to check with a qualified health professional before using any herbs internally.

Mullein is not always biennial 

Mullein is often described as a biennial herb, but here in the Snowy Mountains, it reminds us that plants respond to place.

Our cold winters, snow, summer growth, altitude and seasonal shifts all influence how it behaves.

That is what makes growing herbs so different from simply buying them in a packet.

You do not just learn the herb from a book.
You learn it from the land.

And sometimes, the land has its own version of the story.