Understanding Ground-Growing Bromeliads

When people hear the word “bromeliad”, they often think of plants such as Tillandsia, Guzmania, Vriesea or Neoregelia growing attached to trees.

But not all bromeliads are epiphytes.

Some bromeliads naturally grow on the ground, with their roots developing in soil or another substrate. These are called terrestrial bromeliads.

Understanding this difference is useful because the way a bromeliad naturally grows can tell us a great deal about how it should be cultivated.

What does “terrestrial bromeliad” mean?

The word terrestrial simply means living on or in the ground.

A terrestrial bromeliad is therefore a bromeliad that naturally grows rooted in the ground rather than primarily using trees, rocks or other plants as its growing support.

This does not mean that every terrestrial bromeliad requires heavy, permanently moist soil.

Quite the opposite.

Some terrestrial bromeliads originate from habitats where drainage is extremely fast and periods of drought are part of the natural climate.

Examples include genera such as:

• Dyckia
• Puya
• Cryptanthus
• Bromelia

These plants can look very different from one another, despite all belonging to the Bromeliaceae family.

Terrestrial vs. epiphytic bromeliads

The simplest distinction is where the plant naturally grows.

Terrestrial bromeliads

Terrestrial bromeliads grow with their roots in the ground.

Their roots primarily anchor the plant and absorb water and nutrients from the surrounding substrate.

Depending on the species, they may grow in forest soils, sandy ground, rocky habitats, dry grasslands or other terrestrial environments.

Epiphytic bromeliads

Epiphytic bromeliads grow above ground, often attached to trees or other structures.

The classic example is many species of Tillandsia.

An epiphytic plant does not necessarily behave like a parasite. It may use a tree simply as physical support while obtaining water and nutrients from rain, dust, organic debris and the surrounding atmosphere.

This is one reason why many epiphytic bromeliads require a very different cultivation approach from terrestrial species.

Not every bromeliad has the same water requirements

This is an important point.

The term “bromeliad” describes a large and diverse plant family. It does not automatically tell you whether a plant likes wet conditions, dry conditions, direct sun or shade.

For example, a terrestrial Dyckia can be much more tolerant of strong sunlight and dry conditions than a shade-loving forest bromeliad.

Similarly, some terrestrial species require excellent drainage because their natural habitat experiences pronounced dry periods.

Therefore, instead of asking:

“How do I care for bromeliads?”

it is often better to ask:

“What habitat does this particular bromeliad come from?”

That question gives you a much more useful starting point.

Why drainage is so important

Many terrestrial bromeliads appreciate a substrate that drains quickly.

Their roots need access to oxygen as well as moisture. If the substrate remains saturated for long periods, oxygen availability around the roots can decline and root problems may develop.

A good terrestrial bromeliad substrate can therefore contain materials such as:

• pumice
• perlite
• lava
• coarse sand
• bark
• other mineral or coarse components

The exact mixture should depend on the species.

A plant originating from a dry, rocky habitat may require considerably more mineral material than a species naturally growing in richer forest soil.

Does terrestrial mean it cannot grow in a pot?

No.

“Terrestrial” describes the plant's natural growth habit, not whether it can be cultivated in a container.

In fact, many terrestrial bromeliads are very well suited to pot culture.

A container allows you to control:

• drainage
• substrate composition
• watering
• exposure to sunlight
• winter protection

This can be particularly useful in Central Europe, where many tropical and subtropical bromeliads cannot remain outdoors throughout the winter.

Terrestrial does not mean frost hardy

Another common misunderstanding is that a ground-growing plant must be hardy.

That is not the case.

Some terrestrial bromeliads can tolerate surprisingly cool conditions, while others are distinctly tropical or subtropical and must be protected from cold.

Even within the same genus, species can have significantly different environmental requirements.

Always consider the natural distribution and habitat of the particular species rather than relying solely on the word “terrestrial”.

What about the central cup?

Many bromeliads form a rosette in which the leaves create a central reservoir capable of holding water.

This is particularly familiar from ornamental bromeliads such as Neoregelia.

However, you should not assume that every terrestrial bromeliad should be cultivated in exactly the same way.

Some terrestrial bromeliads are adapted to much drier conditions and may not benefit from constantly maintaining a full central water reservoir.

Again, the natural habitat provides the best guide.

Terrestrial bromeliads and sunlight

Light requirements vary enormously.

Some terrestrial bromeliads, especially plants from open and relatively dry habitats, can appreciate very bright light and even considerable direct sun.

Others naturally grow beneath vegetation and prefer filtered or partial shade.

If you move a plant from a shaded greenhouse directly into strong summer sunlight, even a sun-loving species can suffer leaf damage.

Always acclimatise gradually.

This is particularly important when moving indoor-grown plants outdoors.

Why terrestrial bromeliads are interesting for collectors

One of the great attractions of terrestrial bromeliads is their diversity.

They can form:

• compact rosettes
• large architectural plants
• spiny leaves
• colourful foliage
• dense clumps
• unusual leaf structures

Some species are particularly striking when grown as specimen plants.

Others develop offsets and gradually form impressive groups.

And some, such as Dyckia and Puya, can have an almost architectural or sculptural appearance.

They are bromeliads, but they can look very different from the colourful tropical bromeliads found in garden centres.

Terrestrial does not mean “ordinary soil”

This is perhaps the most useful practical lesson.

If a bromeliad naturally grows on the ground, it does not automatically mean that it should be planted into heavy universal potting soil.

Good cultivation begins with understanding the plant's habitat.

A terrestrial bromeliad from a dry, rocky environment may prefer:

very fast drainage + high mineral content + controlled watering

whereas another terrestrial species from a humid forest environment may appreciate:

more organic material + more consistent moisture + less intense light

Both are terrestrial bromeliads.

Their care is nevertheless quite different.

Terrestrial bromeliad or epiphytic bromeliad – a quick comparison

Characteristic	Terrestrial bromeliad	Epiphytic bromeliad
Natural position	Ground	Trees or other elevated surfaces
Roots	Primarily anchored in substrate	Often mainly for attachment
Typical substrate	Soil/mineral/coarse mixture	Very open, airy material or mounted
Examples	Dyckia, Puya, Cryptanthus	Many Tillandsia, Vriesea, Guzmania
Water requirements	Highly species-dependent	Highly species-dependent
Sunlight	Species-dependent	Species-dependent
Pot cultivation	Usually straightforward	Depends strongly on species

The table is intentionally simple because the most important message is this:

There is no single “bromeliad care routine”.

The best way to care for a terrestrial bromeliad

Before changing the watering schedule, substrate or light level, find out where the species naturally grows.

Ask:

Is it from a humid forest, dry woodland, rocky terrain, grassland or another seasonal environment?

Then try to reproduce the important aspects of that habitat in cultivation.

You don't need to recreate the entire ecosystem.

You simply need to understand what the plant evolved to deal with.

Light.

Water.

Drainage.

Temperature.

Seasonality.

Those five factors will usually tell you far more than the word “bromeliad” alone.

The TOMs FLOWer CLUB approach

At TOMs FLOWer CLUB, I particularly appreciate plants that require us to understand them rather than simply follow a generic care schedule.

A terrestrial bromeliad is a good example.

It may look exotic, but successful cultivation is often quite logical once you understand its natural habitat.

The goal is not to force a plant into fast growth.

It is to give it the conditions in which it can grow naturally, develop strong roots and maintain its characteristic form.

Quality before quantity.

And perhaps the most useful rule of all:

Know the plant before you water the plant.