At this time of year, it is important to get the seeds of the new winter season off to a good start while the soil is still warm. But there is a bit of a problem with this. The majority of the seedlings that will grow well over the winter months are brassicas. They generally do better than then their summer compatriots as they are un-harried by the cabbage white butterfly as the cool conditions don’t suit their tender bits. It is so refreshing to harvest a broccoli in the winter without spending ages picking out the extra protein and then eating with caution – not that you tell the family… “Eat ya greens, its good for you!”
However, in these early days the butterflies are still flitting about as it is still warm enough for them and just one egg laid on a vulnerable seedling can grow into a caterpillar that can demolish the seedling in just a few days. But the butterflies don’t just stop with one egg per plant, your poor brassica seedling finds itself food for many, long before it becomes food for you.
I have struggled with this problem for years. I have used cake nets, kept seedlings indoors until the last moment. I did regular check and squish inspections. I’ve liberally sprinkled derris dust and I’ve been at my wits end.
The other problem at this time of year it is still too hot for tender seedlings in conditions where there is no rain and so the potential to fry seedlings in a moment’s inattention after weeks of tender care is huge. The only really upside to starting from seed at this time of year is things grow so much quicker than in spring so there is less of the ‘will they germinate’ angst and they appear long before you consider giving the soil a bit of a poke to see what is going on. And of course the obvious… you get things to eat mid-winter!
Now in my new garden I have the luxury of a nursery bed, one to grow these autumn seedlings beyond the confines of pots, taking advantage of the moisture deep in the soil and reducing the risk of pots drying out. I’ve always wanted one and am excited to have it. The soil is low nutrient as the seedlings don’t really need a heavy rich soil. What that means is I haven’t added compost and well-rotted manure or anything, but I may tickle it with a little bit of something, so it isn’t completely devoid of nutrients – other that what is in the soil. And it is fully irrigated, so the seedlings can have their thirst quenched easily.
So, I was all set to go with the seeds, but the butterfly conundrum held me back… and I gave the problem a lot of thought. I did buy a tunnel house to protect the seedlings, but it was too small for the bed, so space was wasted and it created gaps around the irrigation tubes, and I caught a butterfly in there and the few seedlings I was trying to protect ended up with holes in their leaves.
Then I came up with a crazy plan, that actually worked! I’m so pleased and now I can sow my seeds knowing not only are the seedlings safe from ravenous green creatures and are protected from the heat of the midday sun.
This is what I did:
Come again soon – the seeds are in and the will come alive once again.
Sarah the Gardener : o)
NB: clicking on the images will give step by step instructions.