Mature size & growth rate

How big does Prince of Wales Juniper (Juniperus horizontalis 'Prince of Wales') get?

Also called Prince of Wales Juniper, Creeping Juniper.

More about prince of wales juniper

About Prince of Wales Juniper

Juniperus horizontalis 'Prince of Wales' · also called Prince of Wales Juniper, Creeping Juniper · flowering

Prince of Wales Juniper is a tough, low creeping conifer forming a dense blue-green carpet about 15 cm tall and 1.5-2 m wide, often flushing plum-purple in winter cold. A prairie-bred selection, it excels as drought-tolerant ground cover on banks and in rock gardens, asking only full sun and sharply drained soil.

Mature size: About 15-20 cm tall and 1.5-2 m wide at maturity.

Watch for — Tip blight (Phomopsis/Kabatina): Browning shoot tips in damp weather; prune affected growth, boost airflow and keep foliage dry.

Indoor size vs how big it gets in the wild

Prince of Wales Juniper grows on a tree's timeline and scale — indoors it becomes a tall, trunked statement plant rather than a tabletop one. Indoors and in a pot, expect about 15-20 cm tall and 1.5-2 m wide at maturity.. A pot, your light levels and a little pruning are what set the final size in a home, far more than the plant's theoretical potential.

It gains real height on a trunk or main stem, adding a tier of leaves a year and eventually reaching for the ceiling — this is a plant you grow up, not out.

Growth rate and years to mature

Prince of Wales Juniper is a moderate grower. Realistically, expect three to six years to reach mature indoor size, gaining a steady amount each growing season. Its feeding profile backs this up: minimal. a light spring dose of balanced slow-release granular fertiliser supports new plantings; established mats in reasonable soil rarely need feeding. avoid heavy nitrogen, which weakens growth.

Want this turned into the right next pot at the right moment? The pot size calculator and the prince of wales juniper repotting guide cover when and how much to size up — pot size is one of the biggest levers on how fast prince of wales juniper grows.

How to keep prince of wales juniper smaller

You are not stuck with the maximum size. For prince of wales juniper specifically, these are the levers, in order of impact:

The decisive tool is the secateurs: prince of wales juniper can be topped (cut the main growing tip) to cap its height and force a bushier, shorter shape.
Keeping it deliberately pot-bound in a snug container slows the whole plant and limits ultimate size.
Prune in spring so it heals fast; remove the tallest leader back to a node to reset the height.
Expect to top or hard-prune it every year or two — left alone it heads for the ceiling.

The keep-it-smaller method, step by step

Pick the new height. Decide how tall you want prince of wales juniper and find a leaf node or branch point just below that.
Top the main stem. Cut the main growing tip cleanly just above that node in spring; this permanently caps the height and forces side branches.
Keep the pot snug. Avoid jumping to a much bigger pot — a slightly restricted rootball keeps the whole plant smaller.
Maintain the shape. Prune back the tallest new leaders each spring to hold it at the height you chose.

How to grow prince of wales juniper bigger or faster

If you want it to fill the space sooner, push the conditions rather than hoping — for prince of wales juniper the accelerators are:

It already wants the bright light it needs; warmth, a yearly pot-up and spring-summer feed are the accelerators.
Pot up a size every year or two while young; restricted roots are the main thing holding height back.
Feed regularly through the growing season and keep it warm — height comes from sustained good conditions.

Light is almost always the ceiling. The prince of wales juniper light requirements page covers exactly how bright a spot it needs to grow at its potential instead of stalling.

When prince of wales juniper outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for prince of wales juniper:

The top leaves pressing against or bent by the ceiling — the classic "this is now too tall indoors" sign.
It has to be moved away from a light source it has literally outgrown.
Roots filling the largest pot you can reasonably keep indoors — at that point it is top-or-prune or move it outside (if hardy).

If it is the pot rather than the room, it is a repotting job, not a goodbye — see the prince of wales juniper repotting guide. If you want more of this plant instead of a bigger one, the prince of wales juniper propagation guide turns prunings into new plants.

Prince of Wales Juniper size — frequently asked questions

How big does prince of wales juniper get?

Prince of Wales Juniper reaches about 15-20 cm tall and 1.5-2 m wide at maturity. when grown indoors. It gains real height on a trunk or main stem, adding a tier of leaves a year and eventually reaching for the ceiling — this is a plant you grow up, not out.

Is prince of wales juniper slow or fast growing?

Prince of Wales Juniper is a moderate grower. Expect three to six years to reach mature indoor size, gaining a steady amount each growing season. Prince of Wales Juniper grows on a tree's timeline and scale — indoors it becomes a tall, trunked statement plant rather than a tabletop one.

How long does prince of wales juniper take to reach full size?

Roughly three to six years to reach mature indoor size, gaining a steady amount each growing season. Light, pot size and feeding move that timeline more than anything else.

How do I keep prince of wales juniper smaller?

The decisive tool is the secateurs: prince of wales juniper can be topped (cut the main growing tip) to cap its height and force a bushier, shorter shape. Keeping it deliberately pot-bound in a snug container slows the whole plant and limits ultimate size. Prune in spring so it heals fast; remove the tallest leader back to a node to reset the height. Expect to top or hard-prune it every year or two — left alone it heads for the ceiling.

How can I make prince of wales juniper grow bigger or faster?

It already wants the bright light it needs; warmth, a yearly pot-up and spring-summer feed are the accelerators. Pot up a size every year or two while young; restricted roots are the main thing holding height back. Feed regularly through the growing season and keep it warm — height comes from sustained good conditions.