Mature size & growth rate

How big does Wild Rocket (Diplotaxis tenuifolia) get?

Also called Perennial wall-rocket, Lincoln weed, Sand rocket.

More about wild rocket

About Wild Rocket

Diplotaxis tenuifolia · also called Perennial wall-rocket, Lincoln weed · edible

Wild Rocket is a perennial Mediterranean leaf vegetable with a more intense, peppery flavour than cultivated rocket. Unlike annual salad rocket, it regrows vigorously after cutting. Drought-tolerant and long-lived once established, it thrives in well-drained soil and full sun. Fully edible and pet-safe for dogs and cats.

Mature size: 30-60 cm tall in full growth; spreads 30-40 cm

Watch for — Bolting: Warm weather triggers flowering. Remove flower stems to prolong leafy growth; allow some to set seed for self-sowing.

Indoor size vs how big it gets in the wild

Wild Rocket is a garden shrub whose final size is set more by your secateurs than by the plant — pruning, not luck, decides how big it gets. Indoors and in a pot, expect 30-60 cm tall in full growth. In the ground with no restriction it is a completely different plant — spreads 30-40 cm — which is why the pot, the light and the pruning matter so much for the size you actually end up with.

Left unpruned it builds a woody framework that gets taller and wider every year; with annual pruning you hold it at whatever size suits the space.

Growth rate and years to mature

Wild Rocket is a fast grower. Realistically, expect two to four years from a young plant to a room-filling specimen in good light. Its feeding profile backs this up: wild rocket rarely needs feeding in the ground. in containers, apply a balanced liquid feed at half-strength once a month during the growing season (spring to autumn). over-fertilising with nitrogen dilutes the characteristic peppery flavour.

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

How to keep wild rocket smaller

You are not stuck with the maximum size. For wild rocket specifically, these are the levers, in order of impact:

Prune wild rocket annually at the right time for its type — this is the primary, expected way to control its size.
Remove the oldest, thickest stems at the base each year to keep it open and within bounds.
Growing it in a large container rather than open ground naturally restricts the ultimate size.
Avoid heavy feeding if you want to limit growth — rich soil and lots of nitrogen drive bigger, faster shrubs.

The keep-it-smaller method, step by step

Prune at the right time. Time the cut to wild rocket's type (after flowering for many spring shrubs, late winter for summer-flowering ones) so you do not lose the next display.
Take out the oldest stems. Remove up to a third of the oldest, thickest stems at the base to renew the shrub and contain it.
Shorten the rest. Cut the remaining stems back to an outward-facing bud at the height and width you want.
Restrict the roots. For a permanent size cap, grow it in a large container rather than open ground.

How to grow wild rocket bigger or faster

If you want it to fill the space sooner, push the conditions rather than hoping — for wild rocket the accelerators are:

Plant it in open ground in good soil — far more vigorous than a container-restricted plant.
Full sun (which it wants) plus an annual mulch and feed gives the strongest growth.
Water well through the first establishment years; a settled root system drives the fastest size gain.

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

When wild rocket outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for wild rocket:

It shades or crowds neighbouring plants, or blocks a path it used to clear.
Bare, woody, unproductive centres with growth only on the outside — a sign it needs renovation pruning.
It has clearly exceeded the space you allotted and an annual trim no longer holds it.

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

Wild Rocket size — frequently asked questions

How big does wild rocket get?

Wild Rocket reaches 30-60 cm tall in full growth when grown indoors, and far larger where it grows unrestricted (spreads 30-40 cm). Left unpruned it builds a woody framework that gets taller and wider every year; with annual pruning you hold it at whatever size suits the space.

Is wild rocket slow or fast growing?

Wild Rocket is a fast grower. Expect two to four years from a young plant to a room-filling specimen in good light. Wild Rocket is a garden shrub whose final size is set more by your secateurs than by the plant — pruning, not luck, decides how big it gets.

How long does wild rocket take to reach full size?

Roughly two to four years from a young plant to a room-filling specimen in good light. Light, pot size and feeding move that timeline more than anything else.

How do I keep wild rocket smaller?

Prune wild rocket annually at the right time for its type — this is the primary, expected way to control its size. Remove the oldest, thickest stems at the base each year to keep it open and within bounds. Growing it in a large container rather than open ground naturally restricts the ultimate size. Avoid heavy feeding if you want to limit growth — rich soil and lots of nitrogen drive bigger, faster shrubs.

How can I make wild rocket grow bigger or faster?

Plant it in open ground in good soil — far more vigorous than a container-restricted plant. Full sun (which it wants) plus an annual mulch and feed gives the strongest growth. Water well through the first establishment years; a settled root system drives the fastest size gain.