What Your Camellia Needs In April – 5 Expert-Backed Tasks For Better Blooms Next Year
Here's what you should do as soon as flowering finishes
Many gardeners assume that once a camellia finishes flowering, it can be left alone for the rest of the year. In fact, the weeks immediately after the last bloom fades are the most consequential of the entire year – and what you do now will determine how well your plant performs next spring.
Camellias are evergreen shrubs that thrive in acidic soil and sheltered, lightly shaded positions. What makes them particularly distinctive is their timing: as soon as flowering ends, they begin forming buds for next year. So the decisions you make now – from pruning to feeding – directly shape next year's display.
Article continues below1. Prioritize Pruning
There is a narrow but critical window when it comes to pruning camellias. It should be done as soon as they finish flowering, as this is when the plant begins forming new buds in preparation for next year. Camellias produce flowers on old wood, meaning those buds develop on this season's growth.
'By pruning immediately after flowering, you’re encouraging new growth for the rest of the season and giving the plant plenty of room to produce new buds,' explains Vikram Baliga, Assistant Professor of Practice of Horticulture at Texas Tech University. 'If you wait too long and prune in summer or fall, you end up removing those brand-new buds, and the plant won’t flower well in the following spring.'
The deadline is late June, after which you risk cutting into next season's display. That said, the exact time of pruning will depend on the hardiness zone where you live.
Camellias should be pruned with sharp hand pruners, rather than with hedge shears. Shearing damages the leaves (which will turn brown where they are cut) and encourages new growth only where the stems have been cut, which restricts the airflow the plant needs to stay healthy.
A sharp pair of bypass pruners, such as these Wolf-Garten Secateurs from Amazon, will give you clean, precise cuts that heal quickly.
Aim to prune the shrub by no more than about a third of its size, cut out any dead or damaged branches, and remove any wispy stems. Finally, remove any spent flowers to prevent it from making seeds.
Vikram is an Assistant Professor of Practice of Horticulture at Texas Tech University. He has a doctorate in horticulture and teaches hundreds of college students every year about plant science and the environment. Vikram is the author of Plants to the Rescue, and the host of the Planthropology Podcast.
2. Feed It Before Summer Arrives
After pruning, fertilizing camellias should be the next priority. Camellias prefer an acidic soil – ideally between 5.5 and 6.5 on the pH scale – and the right fertilizer supports both healthy growth and the soil conditions they rely on.
Look for a slow-release, granular formula designed for acid-loving plants, such as this Azalea, Camellia & Rhododendron Plant Food Fertilizer from Walmart, which feeds plants for up to three months.
'Adding fertilizer for acidic plants (8-8-8 or 10-10-10) is best in spring after flowering to promote new growth and setting of buds,' explains landscape designer Caroline Ervin.
A second fertilization later in the summer is worthwhile, as long as you don't leave it too late. 'Fertilizer will prompt new growth and any new leaves will need time to harden off before winter. Too much fertilizing will predispose the plants to greater damage in winter,' adds Caroline.
Adding compost or organic matter around the base at the same time is also worth doing, as it lowers pH gradually and helps to improve overall soil health.
For an organic option, Espoma Organic Holly-Tone Zone from Amazon is specifically formulated for camellias and contains sulfur to help maintain soil acidity as it feeds.
Caroline is a landscape designer. She has worked with clients since 2007 to install and maintain small and large residential gardens in Washington DC. She has more than 20 years hands-on experience gardening.
3. Deal With Petal Blight Now
One of the most common camellia problems is petal blight, a fungal disease that affects the flowers.
'Symptoms include brown blotches on the flowers, while the rest of the plant remains untouched,' says Lotte Berendsen, plant expert at PlantIn. 'Blooms may drop from the plant prematurely, leaving your Camellia sparse and unhappy.'
What makes it particularly troublesome is how long it persists. 'The fungus can transfer from infected, fallen flowers to the soil, where it may continue to live and reinfect plants for three to five years,' explains Vikram.
Good spring sanitation is your best defence: remove all fallen blooms around your camellias to help minimize the spread of the infection, as spores often hibernate in old plant material. 'Make sure you do not compost infected plant material, as this can allow the disease to creep back into your garden,' warns Lotte.
If blight has already taken hold, treating with a copper-based fungicide can help limit further spread. You can get Nature IQ's Copper Fungicide at Amazon, which is approved for organic gardening and safe to use directly on camellias.
If you suspect the fungus has already established in the soil, Caroline recommends removing and replacing both the mulch and the top three to four inches of soil around the plant. It's a bigger job, but it breaks the cycle before it costs you another season.
Lotte is a gardening enthusiast, writer, and plant expert at PlantIn, where she provides customers with detailed care and treatment plans
4. Water Deeply Not Daily
Knowing when to water plants can be tricky to judge, and camellias are no exception.
Camellias like consistent and deeply watered soil, says Caroline. 'They are especially sensitive to drought in the summer which is when they are using their energy to set buds for the following year. However, camellias should not be overwatered to prevent root rot and fungus.'
You can usually tell if camellias are under-watered as they will drop buds, have little or stunted leaf growth, and the leaves will turn yellow. If overwatered, the leaves will turn yellow and fall, or develop blistering on the surface.
How to water plants matters just as much as how often. 'It’s much better to water your plants heavily and thoroughly saturate the soil once every few days, rather than giving them a small drink daily,' adds Vikram.
If your soil tends to dry out quickly, applying a layer of organic mulch over the root zone in April is a great way to help retain moisture throughout the summer months – which is exactly when camellias need it most. You can pick up this organic compost and manure from Lowe's.
5. Test Soil pH If Flowering Or Growth Is Poor
If your camellia is producing fewer blooms than expected, or showing signs of poor growth, there's usually an underlying issue. Soil pH plays a crucial role in how well the plant can absorb nutrients, and even well-fed camellias will struggle if the conditions aren't right.
One of the most tell-tale signs is yellowing leaves, or yellow leaves with dark green veins, which often points to iron deficiency caused by pH that's too high. A simple kit to test soil pH - such as this one from Lowe's - will confirm if that's the issue.
'If you find that the soil is too alkaline, you can add sulfur to lower the pH level,' suggests Lotte. 'It takes a while for the soil to adjust, but using sulfur is the safest and most effective way to correct your soil’s pH.'
Now you know what your camellia needs in April, you may be looking for more expert gardening advice.
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