If you’ve ever stood in front of a camellia in full bloom and thought, “I need that in my garden” — this complete guide to growing camellias is exactly what I wish someone had handed me thirty years ago. I killed my first two camellias before I figured out what they actually needed. Wrong soil, wrong drainage, too much love with the watering can. Since then I’ve grown more than 200 named cultivars here in the Pacific Northwest, and I can tell you with confidence: camellias are not difficult. They just have specific preferences, and once you understand those, everything clicks.
I wrote this guide because I kept watching new gardeners make the same avoidable mistakes. They’d buy a beautiful Camellia japonica at a nursery, plant it wrong, watch it struggle, and give up on the whole genus. That’s a tragedy. These are some of the most spectacular flowering shrubs in the temperate world. Get the basics right from the start, and you’ll have a plant that blooms reliably for decades — possibly outliving you.
This is my definitive resource. I’ll walk you through choosing varieties, preparing your soil, planting correctly, watering and fertilising, pruning, dealing with pests, and caring for your camellias across all four seasons. Bookmark it. Come back to it. And if you have questions, leave them in the comments — I read every one.
Understanding Camellia Species and Varieties
Before you buy anything, you need to understand the three species you’ll most commonly encounter. Getting this right saves you money and disappointment. Each species has a distinct personality, bloom time, and cold tolerance.
Camellia japonica — The Classic Choice
Camellia japonica is what most people picture when they think of camellias. Large, formal blooms in shades of red, pink, white, and bicolour. There are over 2,000 named japonica cultivars worldwide. In my garden, ‘Adolphe Audusson’ — a deep blood-red semi-double — has been blooming without fail every February for eighteen years. That said, japonicas are the most cold-sensitive of the three main species. Most are hardy to around 10°F (-12°C), though some cold-hardy selections push lower.
Camellia sasanqua — The Autumn Bloomer
Camellia sasanqua blooms in autumn and early winter — October through December in my zone. The flowers are smaller and more delicate than japonicas, often fragrant, and they tolerate sun far better. Sasanquas are also slightly hardier and faster-growing. I use them along a south-facing fence where a japonica would scorch. ‘Yuletide’ is the classic red sasanqua. ‘Setsugekka’ — white, semi-double, lightly fragrant — is another standout.
Camellia sinensis — The Tea Plant
Camellia sinensis is the species used to make tea. The flowers are small, white, and unassuming. However, the plant itself is remarkably tough and cold-hardy — down to 0°F (-18°C) in some selections. It makes a handsome hedge. I grow a small block of it as a novelty, and I do harvest and process the leaves each autumn. [INTERNAL LINK: how to harvest and process camellia sinensis tea at home]
Choosing the Right Site — Sun, Shade, and Shelter
Site selection is probably where most beginners go wrong first. Camellias are often marketed as shade plants, and while they do tolerate shade, that’s not the whole story. In my experience, the ideal position is dappled or morning light with afternoon shade. Think of where they grow naturally — the forest edges of eastern Asia. They want light filtered through taller trees, not deep gloom.
Avoid planting on an east-facing wall if you experience late frosts. Rapid thawing of frost-damaged buds causes the worst bud drop. A west or north-facing position actually protects the plant by allowing slower, gentler thawing. I learned this after losing an entire season of blooms on my ‘Nuccio’s Gem’ — planted on an east-facing corner — during a sharp late frost in March. I moved it the following autumn and never lost another bud from frost damage.
Wind protection matters as well. Cold desiccating winds in winter cause leaf scorch and bud damage. A building, fence, or established hedge on the prevailing wind side makes a real difference. Aim for a site with good air circulation — not a dead-still pocket where fungal issues linger — but shelter from the worst exposure.
Soil Preparation — The Single Most Important Step
I’ll be direct: get the soil right, and camellias almost grow themselves. Get it wrong, and no amount of watering, feeding, or pruning will save them. Camellias require acidic, well-draining, humus-rich soil. The target pH is 5.5 to 6.5. Above 7.0 and they’ll show interveinal chlorosis — yellowing leaves with green veins — as they lose access to iron and manganese.
Testing and Adjusting Your Soil pH
Buy a reliable soil pH meter or use a test kit before you plant anything. I test every new bed. If your pH is between 6.5 and 7.0, incorporate sulphur into the soil — roughly 1 to 2 pounds per 100 square feet, depending on your soil type — several months before planting. Clay soils require more amendment than sandy soils. For pH above 7.0, consider raised beds or large containers with purpose-mixed ericaceous compost instead of fighting your native soil.
Building the Ideal Planting Bed
Drainage is non-negotiable. Camellias will not tolerate waterlogged roots. Even brief periods of standing water in winter can cause root rot — specifically Phytophthora cinnamomi, a water mould pathogen that’s almost impossible to recover from once established. Dig a test hole 12 inches deep, fill it with water, and observe. If water is still standing after one hour, improve drainage before you plant.
For heavy clay soils, I incorporate coarse grit and composted bark at a ratio of roughly one part grit, one part bark, two parts existing soil. This opens up the structure dramatically. Plant the rootball slightly proud of the soil surface — no more than 2 inches above grade — and mound up around it rather than planting into a sump. Mulch with a 3-inch layer of composted bark or pine needles, keeping mulch 3 to 4 inches away from the stem itself.
Planting Your Camellia — A Step-by-Step Process
The best time to plant is autumn in most temperate climates, giving the roots a full cool season to establish before summer heat arrives. Spring planting is acceptable, but summer planting is high risk — the plant is under heat stress before its roots are established. Container-grown specimens can technically be planted any time the ground is workable, but I consistently get better results with autumn planting.
How to Plant Step by Step
- Dig a hole at least twice the width of the rootball and no deeper than the rootball’s height.
- Roughen the sides of the hole with a fork to prevent glazing in clay soils.
- Do not add fertiliser to the planting hole — this burns new roots.
- Soak the rootball thoroughly before removing from the container.
- Check the top of the rootball is level with or very slightly above surrounding soil.
- Backfill with your improved soil mix, firming gently in stages.
- Water deeply — enough to settle the soil, not to flood the root zone.
- Apply 3 inches of mulch in a ring, not touching the stem.
Spacing depends on your goal. For specimen shrubs, allow at least 5 to 6 feet per plant. For hedging or espaliered plants on a wall, 3 feet apart is workable. Camellias in my garden range from compact varieties under 4 feet tall to an old japonica near my back boundary that has reached 14 feet. Know the mature size of your cultivar before you plant. [INTERNAL LINK: camellia variety size guide]
Watering, Feeding, and Ongoing Care
Newly planted camellias need consistent moisture for the first two years. After that, established plants are surprisingly drought-tolerant — far more than most gardeners expect. However, the single most critical watering period is late summer, specifically July through September in the Northern Hemisphere. This is when next year’s flower buds are forming. Water stress during this window causes bud drop months later, in mid-winter, when the buds should be opening. I’ve seen gardeners blame disease or cold damage when the real culprit was a dry August three months earlier.
How Much and How Often to Water
For established plants in summer, deep watering once a week is preferable to light watering every day. “Deep” means thoroughly wetting the root zone — roughly 12 to 18 inches down. A drip or soaker hose system running for 45 to 60 minutes per week achieves this efficiently. Overhead watering in humid conditions encourages fungal issues, so water at the base when possible. In my cool Pacific Northwest climate, I rarely water after September. In warmer or drier climates, you’ll need to adjust accordingly.
Fertilising Camellias Correctly
Camellias are light feeders. Overfeeding — particularly with nitrogen — promotes lush soft growth that is vulnerable to aphid attack and frost damage. Use an acid-formulated fertiliser designed for ericaceous plants. Apply once in spring as new growth begins, and optionally once more in early summer. Never fertilise after July. Late-season feeding pushes tender new growth that won’t harden off before cold weather arrives. I’ve seen significant cold damage on plants that were fertilised in August.
In my garden I also topdress with composted pine bark each spring. This gradually acidifies the soil, improves structure, and feeds the soil biology. It’s the single most consistent practice in my routine after watering. [INTERNAL LINK: fertilising camellias — complete guide to timing and nutrients]
Pruning Camellias — Less Is Usually More
New camellia growers tend to either never prune at all — letting plants become leggy and congested — or prune at the wrong time and remove all the buds. Let me clarify both issues. Camellias set their flower buds in late summer on the current season’s growth. Pruning in autumn or winter removes those buds. The correct time to prune is immediately after flowering finishes, before the new growth flush begins. For japonicas, this is typically March or April. For sasanquas, which bloom in autumn, prune in January or February.
What to Prune and Why
Routine maintenance pruning involves three objectives: removing dead or crossing branches, reducing congestion in the centre to improve air circulation, and shaping the overall outline of the plant. I also tip-prune young plants in their first two to three years to encourage bushiness. Simply pinch or snip the growing tips on new shoots after the spring flush hardens. This builds a fuller, more flower-productive plant over time.
Camellias respond well to hard renovation pruning if a plant has become too large or leggy. You can cut back into old wood — even quite large stems. However, renovation pruning sacrifices one to two seasons of flowers while the plant recovers. I typically renovate in stages over two years rather than all at once, removing a third of the old framework each spring. This keeps some flower display going throughout the process.
Pests, Diseases, and Common Problems
Camellias are generally robust. Grown in the right conditions, they’re not particularly pest-prone. That said, a handful of problems occur frequently enough that every grower should be able to recognise them.
Camellia Petal Blight
Petal blight — caused by the fungus Ciborinia camelliae — is the most damaging disease you’re likely to encounter. Infected flowers develop brown veining that spreads rapidly, turning petals completely brown within days. The flowers look rotted but the foliage remains unaffected. Critically, the disease overwinters in infected petals that fall to the ground. Scrupulous removal and disposal of fallen blooms — not composting them — is the most effective cultural control. Don’t leave infected petals to accumulate under the plant.
Vine Weevil
Vine weevil is a serious pest, especially for container-grown camellias. The adult beetles notch leaf margins — unsightly but not fatal. The larvae, however, feed on roots underground and can kill a plant completely before you notice anything is wrong. If a container camellia suddenly wilts and dies in late summer for no apparent reason, vine weevil larvae are the likely culprit. Check the rootball immediately. Biological controls using nematodes, applied in late summer when the soil is warm, are effective preventive treatments for container plants.
Scale Insects and Aphids
Tea scale — a specific scale insect — appears as white or brown crusty patches on the undersides of leaves. Heavy infestations cause yellow mottling on the upper surface. Aphids target soft new growth in spring. Both pests are manageable with horticultural oil treatments applied when pests are present. Good air circulation and avoiding over-fertilisation reduce susceptibility significantly. A plant growing in the right conditions with appropriate nutrition is far less attractive to sucking insects than one pushing soft, nitrogen-rich growth.
Year-Round Care Calendar
One question I get asked constantly is: “What should I be doing with my camellias right now?” Here’s how I think about the year in my garden.
Spring (March–May)
- Prune japonicas immediately after flowering ends.
- Apply spring fertiliser as new growth begins.
- Topdress with fresh composted bark mulch.
- Tip-prune young plants to encourage bushiness.
- Watch for aphids on new growth flushes.
Summer (June–August)
- Water consistently — this is the bud-formation period.
- Apply a second, light fertiliser feed in early June if desired.
- Stop all feeding by end of July without exception.
- Apply nematodes to containers for vine weevil control in August.
- Check for tea scale on leaf undersides.
Autumn (September–November)
- Continue watering until autumn rains reliably arrive.
- Plant new camellias — this is the ideal planting window.
- Enjoy sasanqua blooms from October onwards.
- Prune sasanquas once flowering finishes.
- Protect newly planted specimens with horticultural fleece if early frosts are forecast.
Winter (December–February)
- Enjoy japonica blooms — many begin flowering from December in mild areas.
- Remove fallen petals promptly to prevent petal blight overwintering.
- Protect buds on frost-sensitive varieties with fleece during hard freezes.
- Do not prune — buds are set and waiting to open.
- Plan additions and note what is working well in the garden.
Common Beginner Mistakes — And How to Avoid Them
Mistake 1: Planting Too Deep
This is probably the most common mistake I see. The crown of the rootball gets buried below soil level, water collects around the stem, and the plant slowly declines over one to two years. You’ll notice yellowing, poor growth, and eventual stem rot. Always plant proud — the top of the rootball should sit at or just above the surrounding soil level. When in doubt, plant higher rather than lower.
Mistake 2: Pruning at the Wrong Time
Autumn pruning removes the very buds you’ve been waiting all year to see. I completely understand the temptation — the plant looks untidy after a long summer, and secateurs are in hand. Resist it. Write the flowering time of each plant on a label in your garden. Prune within four to six weeks of flowering finishing, then leave the plant alone.
Mistake 3: Blaming Cold for Yellow Leaves
Yellow leaves in spring or summer are almost always a soil pH problem, not cold damage. Cold damage looks different — blackened, papery, or wilted tissue on new growth following a frost. Interveinal chlorosis — yellow between the leaf veins with veins remaining green — signals iron deficiency caused by alkaline soil. Test your pH before reaching for a foliar iron spray. Treating the symptom without correcting the underlying pH gives only short-term improvement.
Mistake 4: Overwatering Established Plants
I made this mistake with a beautiful ‘Bob Hope’ japonica in my second year of growing. I watered it religiously through its first autumn and winter — a very wet Pacific Northwest season — and lost it to root rot by spring. Established camellias in mild, rainy climates often need no supplemental water from October through April. Know your climate. More camellias die from overwatering than from drought.
Mistake 5: Buying Without Knowing the Mature Size
A 2-gallon container plant in a nursery gives very little indication of what it will become in fifteen years. Some japonica cultivars reach 20 feet or more. Others top out at 4 feet and make excellent foundation plantings. Always research the mature dimensions of a named cultivar before purchasing. A plant in the wrong place costs significant labour — or a plant — to remedy.
Final Thoughts — Your Complete Guide to Growing Camellias Starts Here
This complete guide to growing camellias covers the fundamentals — but the real education begins when you get plants in the ground and start observing them closely. Every garden is different. My Pacific Northwest conditions aren’t yours. The varieties that thrive in my zone 8b garden may not be the right choices for zone 6 or zone 10. However, the underlying principles — correct pH, excellent drainage, appropriate siting, restrained feeding, right-time pruning — apply universally.
Start with two or three plants rather than twenty. Learn them. Understand what they look like when they’re thriving versus struggling. In my experience, gardeners who succeed with camellias long-term are the ones who observe first and act second. The plants will tell you what they need if you pay attention.
Camellias are not high-maintenance plants. They are specific-requirements plants. Meet those requirements, and you’ll be rewarded with decades of extraordinary blooms in a season — late autumn through early spring — when almost nothing else in the garden is flowering. That’s a remarkable gift. I’ve been grateful for it every year for thirty years, and I have no intention of stopping.
Welcome to the obsession. I hope this guide serves you well.
