Mature size & growth rate

How big does Hazel Smith Sequoia (Sequoiadendron giganteum 'Hazel Smith') get?

Also called Hazel Smith Giant Sequoia, Dwarf Giant Sequoia, Blue Giant Sequoia.

More about hazel smith sequoia

About Hazel Smith Sequoia

Sequoiadendron giganteum 'Hazel Smith' · also called Hazel Smith Giant Sequoia, Dwarf Giant Sequoia · flowering

Hazel Smith Sequoia is a notably blue-green cultivar of the giant sequoia with a dense, broadly conical habit, selected for its outstanding foliage colour. It grows far more slowly than the species, making it suitable for larger gardens. Not listed by the ASPCA as toxic; considered low-risk to pets.

Mature size: 10-20 m tall, 5-8 m wide after several decades; significantly smaller than the species

Indoor size vs how big it gets in the wild

Hazel Smith Sequoia is a tree at heart. Indoors a pot and your ceiling keep it to 10-20 m tall, 5-8 m wide after several decades, but in the ground it is a different scale of plant entirely (significantly smaller than the species). Indoors and in a pot, expect 10-20 m tall, 5-8 m wide after several decades. In the ground with no restriction it is a completely different plant — significantly smaller than the species — which is why the pot, the light and the pruning matter so much for the size you actually end up with.

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

Hazel Smith Sequoia 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: apply a balanced slow-release fertiliser in early spring during establishment years. mature trees rarely require feeding if grown in reasonably fertile soil.

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

How to keep hazel smith sequoia smaller

You are not stuck with the maximum size. For hazel smith sequoia specifically, these are the levers, in order of impact:

The decisive tool is the secateurs: hazel smith sequoia 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 hazel smith sequoia 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 hazel smith sequoia bigger or faster

If you want it to fill the space sooner, push the conditions rather than hoping — for hazel smith sequoia 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 hazel smith sequoia light requirements page covers exactly how bright a spot it needs to grow at its potential instead of stalling.

When hazel smith sequoia outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for hazel smith sequoia:

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 hazel smith sequoia repotting guide. If you want more of this plant instead of a bigger one, the hazel smith sequoia propagation guide turns prunings into new plants.

Hazel Smith Sequoia size — frequently asked questions

How big does hazel smith sequoia get?

Hazel Smith Sequoia reaches 10-20 m tall, 5-8 m wide after several decades when grown indoors, and far larger where it grows unrestricted (significantly smaller than the species). 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 hazel smith sequoia slow or fast growing?

Hazel Smith Sequoia is a moderate grower. Expect three to six years to reach mature indoor size, gaining a steady amount each growing season. Hazel Smith Sequoia is a tree at heart. Indoors a pot and your ceiling keep it to 10-20 m tall, 5-8 m wide after several decades, but in the ground it is a different scale of plant entirely (significantly smaller than the species).

How long does hazel smith sequoia 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 hazel smith sequoia smaller?

The decisive tool is the secateurs: hazel smith sequoia 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 hazel smith sequoia 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.