When a Quick Tidy Turns Into a Sad Day on the Allotment
This wasn't part of my writing plan!
The plan was simple: check over the Brassicas, a quick tidy, a bit of editing, and a gentle reminder that sometimes you have to kill a few plants to become a better gardener. You know the reel I mean - the one that started with “Kill more plants… it’ll make you a better gardener.”
Instead, it turned into one of those days every plot holder dreads.
The tidy that started out fine
Bed one was textbook midsummer maintenance. A few plants were clearly struggling, so they came out. Fallen leaves were cleared, the soil surface opened up, and everything looked fresher and happier. No drama, just the usual quiet satisfaction of putting things straight.
Bed two, though, was looking worse for wear. With the drought, we decided to cut our losses. Rather than coax along plants that were clearly failing, we chose to pull them up and get a head start on preparing the soil for whatever would go in there next. Again, still no drama. It was a decision, not a disaster.
Until we saw the roots.
The moment I realised it was clubroot
As we lifted the plants from bed two, the roots didn’t look right. Instead of clean, fibrous systems, they were swollen, distorted and misshapen. That sinking feeling arrived almost instantly.
Clubroot.
In nine years of having this plot, we’ve never had it before. But we do now.
Suddenly, that reel from last week felt a lot harder to listen to. This wasn’t a confidence-building bit of editing. This was a long-term problem.
What clubroot is
Clubroot is a soil-borne disease that infects the roots of brassicas and a few related plants. Once it’s in the soil, it can survive for years - sometimes up to a decade (or longer) - waiting for the right host roots to latch onto.
Infected plants often:
- stall or grow poorly
- wilt even when the soil is moist
- have swollen, club-shaped roots when you pull them up
There’s no cure. You can’t “fix” the soil in a season and carry on as normal. You have to work around it.
How it might have arrived
That’s the question that’s been rattling around my brain ever since we found it.
Clubroot likes moist, damp conditions, and we haven’t exactly had a classic soggy British midsummer this year. So my best guess is that it was already present - or just beginning - the last time brassicas grew in that area, and has simply been waiting for the perfect roots to infect.
It could have arrived on:
- bought-in plants or seedlings - because not even I grow everything from seed!
- soil stuck to tools, boots or wheels
- manure or compost from an external source
Sometimes you never get a neat answer. You just deal with what’s in front of you.
What we did next
Once we realised it was clubroot, the plan changed immediately.
Everything from that bed was removed and bagged. The neighbouring bed, which looked okay, was treated with caution - we pulled a few plants to check their roots and bagged anything suspect. None of that material is going anywhere near our compost, and it’s not going in the council green bin either. I don’t want it ending up in someone else’s garden as “soil improver”.
Beds three and four, thankfully, look fine so far. The plants are healthy above ground, and the few we sacrificed to check the roots looked clean. For now, they’re staying.
What to do if you find clubroot
If you ever find clubroot on your plot, here’s the exact process to follow.
1. Remove every affected plant Don’t hesitate. Anything with clubroot comes out immediately.
2. Bag it and bin it in general waste Not the compost heap. Not the council green bin. Clubroot is soil-borne and can spread through recycled compost.
3. Check neighbouring brassica beds Healthy tops don’t guarantee healthy roots. Sacrifice a couple of plants to be sure.
4. Clean everything Tools, boots, gloves - anything that touched that soil. Don’t drag contaminated soil around the plot.
5. Accept the rotation reality No brassicas in that bed for up to ten years. It’s harsh, but it’s the truth.
6. Grow other things there Clubroot only affects brassicas. You can still grow roots, salads, legumes, herbs and flowers in the infected bed.
7. Plan long-term Raised beds or containers for brassicas. Better drainage. Fewer brassicas, grown more intentionally. And patience.
How to prevent clubroot
Prevention isn’t perfect, but you can reduce the risk significantly.
Grow from seed or if you’re not growing brassicas from seed, make sure seedlings come from a reputable source.
Improve drainage Clubroot thrives in wet, compacted soil. Raised beds, organic matter and good structure help.
Keep tools clean It’s easy to move contaminated soil around without realising.
Avoid walking from infected beds to clean ones Boots carry soil. Soil carries clubroot.
Don’t share compost or soil between plots Even well-meaning swaps can spread problems.
Grow brassicas in containers if space allows Fresh compost, clean environment, no soil history.
Use lime if your soil is very acidic Clubroot prefers acidic conditions. Brassicas prefer neutral to slightly alkaline soil. It’s not a cure, but it can help reduce severity.
None of these guarantee safety, but they stack the odds in your favour.
The long shadow: ten years of no brassicas in that bed
Here’s the bit that really stings: once you’ve got clubroot in a bed, you’re looking at up to ten years before it’s safe to grow brassicas there again.
That means:
- a quarter of allotment is now outside of my usual 4 year crop rotation plan
- Collie Flowers won’t be growing many cauliflowers for a while
- I need to be much more selective about what earns a spot in that infected patch
I won’t stop growing brassicas altogether. I don’t need to avoid them across the whole plot. But I do need fewer, and I need to give them the best possible chance of staying healthy in the beds that are still clean.
Looking ahead
Gardening content often leans heavily into the pretty bits - the harvests, the flowers, the “look how well this did”. But days like this are just as real, and just as important to share.
Sometimes you go out to film a lighthearted tidy and end up documenting a long-term problem. Sometimes “kill more plants” turns into “this is why we have to make hard decisions”.
I’ve explored all of this in more detail here, and because I’m hosting the Brassica Growalong for Garden Folk Magazine, I’ll be talking about it again in the September update - what it means for rotation, how I’m adapting, and how you can protect your own patch.
If you’ve had clubroot on your plot, I’d love to know:
- what changed for you
- how you adapted your rotation
- whether you found any strategies that made it easier to live with
Because right now, I’m re-planning the next decade of brassicas at Collie Flowers - and trying to remember that even on the sad days, we’re still learning.