The complete Kikuyu grass care guide for Australian lawns

Kikuyu is the workhorse of Australian lawns. It's cheap, it's tough, it grows like it's angry, and it'll survive things that would kill a Buffalo stone dead. If you've got full sun and you don't mind mowing more often than you'd like, Kikuyu is hard to beat.

I don't have Kikuyu myself, I went with Sir Walter Buffalo because I've got shade. But half the blokes I talk to in lawn groups run Kikuyu, and I've helped mates troubleshoot theirs enough times to know the common mistakes. This guide is everything I've picked up from them, from turf suppliers, and from the research I did when building LawnSuite.

Why Kikuyu

Kikuyu (Pennisetum clandestinum) is a warm-season grass originally from the highlands of East Africa. It's one of the most popular turf types in Australia for good reason:

• Drought tolerant. Deep root system, handles extended dry periods
• Self-repairing. Fills bare patches faster than any other grass type
• Traffic tough. Handles kids, dogs, and backyard cricket without flinching
• Economical. Cheaper to establish than most turf varieties
• Coastal friendly. Tolerates salt spray and sandy soils
• Frost resistant. Handles light frost better than Buffalo

The trade-offs are real though. Kikuyu is aggressive. It'll invade garden beds, paths, and your neighbour's yard if you let it. It builds thatch fast, needs regular mowing, and goes dormant (brown) in cold winters. It also needs full sun. Minimum 6 hours of direct sunlight. No shade tolerance at all.

Mowing: keep it tight

Kikuyu likes to be mowed short compared to Buffalo. The sweet spot is 25–40mm depending on how manicured you want it.

Look	Height	Mowing Frequency
Bowling green	15–20mm	Every 3–4 days (cylinder mower)
Neat suburban	25–30mm	Weekly
Low maintenance	35–40mm	Every 7–10 days

The one-third rule

Never remove more than one-third of the leaf blade in a single mow. If your Kikuyu is at 60mm and you want it at 30mm, get there over two or three mows.

Scalping (annual reset)

Kikuyu builds thatch aggressively. Once a year, late October to early December. Drop your mower to its lowest setting and scalp it right back. It'll look brown and awful for 2–3 weeks, then come back thicker and healthier than before.

Important: Don't scalp after January. The grass needs the rest of summer to recover. And don't scalp in its first year after laying. Let the roots establish first.

Watering: deep and infrequent

Kikuyu's deep root system means it rewards deep, infrequent watering over light daily sprinkles.

Season	Frequency	Depth
Summer	Every 7–10 days	25–30mm per session
Spring/Autumn	Every 10–14 days	20–25mm per session
Winter	Only if visibly stressed	Rarely needed

How to check

Push a screwdriver into the soil after watering. It should slide in easily to 100–150mm. If it stops short, you haven't watered deep enough.

When to water

Early morning (before 10am) is best. Watering in the evening leaves moisture on the blades overnight, which invites fungal disease. Especially in humid coastal areas.

Water restrictions

Most Australian councils have water restriction rules. Check your local council's website. In general, Kikuyu handles restrictions better than most grasses because of its drought tolerance. It'll go brown in extended drought but will green up again when rain returns.

Fertilising: feed the beast

Kikuyu is a hungry grass. It responds strongly to nitrogen, which is both a blessing and a curse. Too much and it'll grow so fast you can't keep up with mowing.

Schedule

Season	When	What	Rate
Early spring	September	Slow-release granular (balanced NPK)	20–25g per m²
Mid-summer	December–January	Slow-release granular (high N)	20–25g per m²
Late autumn	April–May	Slow-release granular (high K for winter hardiness)	20–25g per m²

That's three feeds per year minimum. If you want to push it, add a liquid fertiliser application every 2–4 weeks during the growing season (October–March) at the label rate.

Key tips

• Always use slow-release during summer. Quick-release nitrogen will cause a massive growth flush that's hard to mow through.
• Water in granular fertiliser within 24 hours of application to avoid burn.
• Don't fertilise in winter. Kikuyu is dormant or semi-dormant. The nutrients won't be taken up and you'll just feed the weeds.
• Get a soil test every 2–3 years. Kikuyu on sandy coastal soil needs different nutrients than Kikuyu on clay.

Calculating how much you need

If your lawn is 200m² and the rate is 25g/m²:

• 200 × 25 = 5,000g = 5kg of fertiliser

Or use LawnSuite's dosage calculator. Enter your zone area and product, and it does the maths for you. Try it free.

Weed control

Kikuyu is dense enough to outcompete most weeds once established. But in winter, when it slows down, weeds move in.

Common Kikuyu weeds

• Bindii (Soliva sessilis). The bastard with the prickles. Treat in late autumn/early winter before it sets seed. Use a selective herbicide containing MCPA + dicamba or bromoxynil.
• Clover. Treat with a broadleaf herbicide (MCPA or dicamba). Or leave it. Some people like it.
• Nutgrass (Cyperus rotundus). Extremely hard to kill. Halosulfuron-methyl is the go-to but requires multiple applications.
• Paspalum. Pull by hand or spot-spray with glyphosate (careful, it'll kill the Kikuyu too).
• Winter grass (Poa annua). Pre-emergent herbicide in late summer/early autumn prevents it. Once it's up, pull by hand.

Safe herbicides for Kikuyu

Kikuyu is tougher than Buffalo when it comes to herbicide tolerance. Most broadleaf selective herbicides are safe on Kikuyu, including products containing:

• MCPA
• Dicamba
• Bromoxynil
• 2,4-D (at label rates)

Always read the label. And always spot-test a small area first if you're using a product for the first time.

Dethatching

Kikuyu builds thatch faster than almost any other grass. Thatch is the layer of dead runners and stems between the green leaf and the soil surface. A little bit (under 15mm) is fine. It insulates the roots and retains moisture. Too much (over 20mm) creates problems:

• Water runs off instead of soaking in
• Fertiliser sits on top and doesn't reach the roots
• Mower wheels sink and scalp the high spots
• Fungal disease gets a foothold in the damp layer

How to dethatch

1. Timing: Late October to early December (start of active growth)
2. Scalp first: Drop mower to lowest setting, catch the clippings
3. Verticut or scarify: Use a vertimower, scarifier, or dethatcher attachment. Go in two directions (cross-hatch pattern).
4. Rake and remove: Get all the debris off the lawn
5. Fertilise: Apply a balanced slow-release fertiliser
6. Water: Deep water to encourage recovery

Your lawn will look terrible for 2–4 weeks. Don't panic. Kikuyu recovers fast in warm weather.

Aeration

Combine dethatching with aeration. Either hollow-tine (core) or solid-tine. This relieves compaction, especially on clay soils, and lets water and nutrients reach the root zone. Once or twice a year in spring/summer is plenty.

Pests and disease

Kikuyu is generally hardy, but watch for:

Couch mite (Aceria cynodoniensis)

Creates rosettes of distorted growth ("witches' broom"). Likes hot, dry conditions. Treat with a miticide or keep the lawn well-watered to discourage them.

Army worm

Chews through leaf blades quickly, leaving brown patches. Most active in late summer/autumn. Treat with a lawn grub killer containing bifenthrin or chlorantraniliprole.

Dollar spot

Small, silver-dollar-sized brown patches. Usually caused by low nitrogen and morning dew. Fix with a feed and improve air circulation. Fungicide (propiconazole) for severe cases.

Kikuyu yellows

A soil-borne fungal disease that causes yellowing and dieback. More common in poorly drained soils. Improve drainage, reduce compaction, and avoid overwatering.

Seasonal care calendar

Month	What to do
Sep	First feed of the season (slow-release). Mow regularly as growth ramps up. Pre-emergent for summer weeds if needed.
Oct	Dethatch and aerate if thatch is over 20mm. Continue mowing weekly.
Nov	Growth peaks. Mow every 5–7 days. Water deeply if no rain.
Dec	Second feed (slow-release, high N). Check for army worm. Water as needed.
Jan	Peak heat. Water deeply every 7–10 days. Keep mowing regularly.
Feb	Growth starts to slow slightly. Spot-treat any summer weeds.
Mar	Last chance for pre-emergent herbicide (winter grass prevention).
Apr	Third feed (slow-release, high K for winter prep). Mowing frequency drops.
May	Final mow before winter slowdown. Treat broadleaf weeds (bindii).
Jun–Jul	Minimal care. Mow only if needed. Don't fertilise. Water rarely.
Aug	Watch for early spring growth. Plan your dethatching and first feed.

Kikuyu vs other grass types

	Kikuyu	Sir Walter Buffalo	Couch	Zoysia
Sun requirement	Full sun (6+ hrs)	4+ hours	Full sun (6+ hrs)	4+ hours
Shade tolerance	None	Moderate	None	Moderate
Drought tolerance	Excellent	Good	Good	Excellent
Mowing height	25–40mm	40–60mm	15–30mm	25–40mm
Thatch buildup	High	High	Moderate	Low
Traffic tolerance	Excellent	Good	Excellent	Good
Winter colour	Goes brown	Stays green (mostly)	Goes brown	Goes brown
Cost to establish	Low	Medium–High	Low–Medium	High
Maintenance level	High (mowing)	Medium	Medium–High	Low–Medium

The bottom line

Kikuyu is the best value lawn in Australia if you've got the sun for it. It's cheap, tough, self-repairing, and drought-tolerant. The price you pay is in maintenance. Regular mowing, annual dethatching, and keeping it from invading everything around it.

Get the basics right. Mow at 25–40mm, feed three times a year, water deep and infrequent, dethatch annually. And Kikuyu will reward you with a dense, green carpet that handles everything Australian summers throw at it.

If you want to track your treatments, calculate dosage rates, and get weather-smart reminders for your Kikuyu lawn, try LawnSuite. It's free during beta. See the full feature list.

More grass type guides

• The complete Sir Walter Buffalo care guide. The most popular turf in Australia
• Why I stopped mowing my Buffalo at 25mm. Mowing height mistakes and fixes
• Best lawn care apps for Australian homeowners. Comparison of every app that works here