So this year we have decided to grow our potatoes in grow bags. There are several reasons for this. Partly this is down to our potatoes from last year. Across the UK last year was quite poor conditions for potato growth, lots of wet weather at the wrong kind of time ended up with blight and slugs being more common than usual. We didn’t experience any blight but we did have a fair amount of our crop hit by slugs. It was a real disappointment to dig up our lovely harvest and find it had been damaged. We also had our potatoes in the field last year and we trialled using lazy beds which were a lot of work to set up and I don’t think they necessarily gave us the best crops. This year a couple of things are different. We now have the dog and the dog kennel up in the field. We also will be living up there in the not too distant future in our caravan as the work is completed. The area we used last year has grown over a fair bit as we kind of neglected it a bit (oops). So we decided to grow our potatoes in bags this year. Growing potatoes in bags is a great way for anyone to start growing some of their own veggies as it requires very little outside space, it could even be done on a balcony, and requires very little skill. In a previous house of ours we had grown potatoes in bags one year so we still had some bags left over but they can be bought from most garden centres or online. I’m even planning on using some of our spare recycling bags this year for our larger main crop varieties.
I always like to chit my seed potatoes, although you don’t really need to chit main crop varieties but as I buy all my seed potatoes at the same time it makes sense to. For chitting potatoes all you require is an egg box or two. Make sure that the side of the potato with the most eyes is facing upmost and leave them to sit in a warm dark place. Chitting just helps to give the seed potatoes a head start. Make sure before you start that you roll down the sides of the grow bag for ease of planting and for more sun exposure, we will roll them up again when we earth up the potatoes. For planting potatoes into bags I tend to go for 4 to 5 inches of a mixture of compost and well rotten manure and then water them and leave for 10-15 minutes or so to let it drain downwards. Then place three seed potatoes with the largest chits pointing upwards (as shown below). There are variations in the sizes of grow bags so if the label suggests to include more or less then go with that. Cover the potatoes with more compost (say three or four inches) and then lightly water again. As there have been a fair number of cold snaps (lots of snow) this year, when I first planted our early potatoes I kept them in the greenhouse to make sure they got off to a good start. If you don’t have a greenhouse then you could keep them indoors until all sign of frost has passed or just don’t plant until a bit later.
In a couple of weeks you should see the first signs of growth. Don’t get over excited and start earthing up yet, I like to wait until I have a good four or five inches of growth first time so I can be sure that they’re well established. Then cover them with compost until the tops of the plants are only just showing. Repeat as often as you can until the bags are full and then just wait. Below are our Red Duke of York earlies. The three bags on the left we planted first and are just about to have their final earthing up, the two bags on the right were planted a couple of weeks later and are due their first earthing up. I’ll update more about how to know when potatoes are ready nearer to the time.