Sometimes, a little harvest from the garden can lead you somewhere you weren't expecting to go.
The other day, I picked five little kumquats from my tree.
Nothing unusual about that, you might say.
But these weren't bought at a market. They came from my little kumquat tree growing in a pot, and I was rather pleased with myself. So, naturally, I took a photo and sent it to my friend Mike in Barbados.
His response surprised me.
He told me that citrus greening has made it almost impossible to get a good crop of citrus in Barbados. There are still trees around, he said, but some have relatively short lives and getting them to produce well has become a real challenge.
And suddenly, my five little kumquats had me thinking about a disease I hadn't thought about seriously in quite a while.
Citrus greening.
A little tree with a bigger story
This is my little kumquat tree.
It isn't particularly large, and it certainly isn't growing in a citrus orchard. It's quite happy in its pot, producing flushes of new growth and, when it's in the mood, plenty of little fruits.
Seeing it loaded with kumquats makes me happy. Happy garden dance! 💃
But my friend's comment reminded me that being able to pick citrus from a healthy tree is something we shouldn't necessarily take for granted.
Because I have seen what citrus greening can do.
I remember seeing it in Barbados
At the time, I knew it was a serious problem.
But that was more than a decade ago.
So when Mike told me what he was experiencing now, I found myself wondering:
What has happened to citrus in Barbados since then?
And then came the second thought:
What about us here in Trinidad and Tobago?
I knew citrus greening was present here. But how widespread is it today?
And what does it mean for the person who has a lime tree in the backyard, a couple of oranges, or—as in my case—a kumquat growing in a pot?
Those questions sent me back to look at this disease again.
So, what exactly is citrus greening?
It is associated with bacteria and is spread by tiny sap-sucking insects called citrus psyllids. (pronounced "sil-lids")
And unfortunately, it isn't the kind of problem where we can simply look at an infected tree and say, “Well, let's give it some fertilizer and see what happens.”
One of the difficulties is that some of the early symptoms can look like other problems we see in the garden.
Leaves may develop uneven or blotchy yellowing. A tree may produce weaker growth and gradually lose vigour. Fruit may become smaller, misshapen or fail to colour and ripen normally.
Eventually, an infected tree can decline significantly.
And that's what makes citrus greening so worrying.
Not every yellow leaf means citrus greening
If you see yellow leaves on your lime or orange tree, don't panic.
Citrus can develop yellow leaves for all sorts of reasons—nutrient deficiencies, poor drainage, root problems, pests and other stresses.
Citrus greening is a serious diagnosis, so we shouldn't try to make it based on one yellow leaf or a photograph posted on Facebook.
Look at the whole tree.
Is there unusual blotchy yellowing? Is the growth declining? Are the fruits changing in size, shape or colour? Is the tree becoming less productive over time?
And if you are concerned, get the proper advice.
And yes, Trinidad has citrus greening too
Citrus greening was confirmed in Trinidad in 2017, and it has been an ongoing concern for the local citrus industry.
So although I might be happily picking kumquats from my little potted tree, citrus greening isn't some distant agricultural problem happening somewhere else.
And that is why I think home gardeners should know a little about it.
Not so that we become amateur plant pathologists.
Just enough to recognise that when something doesn't look right, it may be worth investigating.
What can a home gardener do?
For me, one of the biggest lessons from plant health work has always been this:
Start with healthy planting material.
When buying a new citrus plant, know where it came from. Buy from reputable sources and, where available, look for disease-free or tolerant planting material.
And be careful about moving citrus plants from one garden to another simply because someone has a beautiful tree they are willing to share.
A plant can look perfectly healthy and still present a plant-health risk.
We gardeners love sharing plants.
Believe me, I understand the temptation.
But sometimes being a responsible gardener means saying, “Thank you, but let me find out where this came from first.”
Meanwhile, I'll keep watching my little kumquat tree
For now, I'm going to enjoy my kumquats.
Five little fruits may not seem like much to some people, but gardeners know better.
We celebrate the first flower.
We celebrate the first fruit.
We celebrate the harvest—even when we have to count it on one hand. 😄
But those five kumquats also reminded me of something I learned long ago through my work with Plant Clinics:
Healthy plants are worth protecting.
Diseases can move from place to place. What becomes a serious problem in one country can become a concern for another.
And sometimes we don't appreciate how precious something is until it becomes difficult to grow.
So, the next time you see a healthy citrus tree loaded with fruit, take a moment to appreciate it.
And if you have citrus growing in your garden, keep an eye on it.
Not with fear.
Just with a gardener's usual combination of curiosity, observation and a willingness to learn.
A little garden wisdom
“A healthy garden begins with paying attention.”
Because sometimes the most important thing we can do for our plants is simply notice when something changes.
Because sometimes the most important thing we can do for our plants is simply notice when something changes.
Over to you...
Do you grow citrus in your garden?
Have you ever had a citrus tree that suddenly started declining or stopped producing as well as it used to?
And if you're in Trinidad and Tobago, Barbados or elsewhere in the Caribbean, what has your experience been with citrus greening?
I'd love to hear from other gardeners.
Until next time, keep growing, keep learning—and keep paying attention to what's happening in your garden.
Have you ever had a citrus tree that suddenly started declining or stopped producing as well as it used to?
And if you're in Trinidad and Tobago, Barbados or elsewhere in the Caribbean, what has your experience been with citrus greening?
I'd love to hear from other gardeners.
Until next time, keep growing, keep learning—and keep paying attention to what's happening in your garden.
Grey hair, green thumb and proud of my roots.
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