The Three (English) Sisters

While my garden is neither self-sufficient nor organic (and I hate the automatic assumption that organic is best and anything carrying that label is naturally healthier), I am very interested in the natural ways of getting the most out of the land and the space that you have. I've already experimented with companion plants to ward off pests, with using green manure to prepare beds and will be paying a lot more attention to crop rotation this year.

One interesting idea which I came across was that of The Three Sisters growing system, which is an Iroquois tradition of growing beans, maize and squash together. Most companion planting involves a main crop and a secondary crop in the same bed, with the idea that the secondary crop does something beneficial for the main crop without getting anything back (or in some cases, with the secondary crop being completely ruined). The Three Sisters is novel in that all three of the crops are the main crop and each of them benefit the others. The maize provides a support for the green beans to grow up, the green beans put nitrogen into the soil and the squash has large leaves that shade the ground, keeping the roots cool and blotting out weeds. None of the plants compete with each other as they require different minerals from the soil and the result is a better crop for all three.

I wanted to try this myself, but there were a few factors that were holding me back.
  1) South-west England is not north-eastern America. Maize doesn't particularly like south-west England and, if I was to plant all three plants together, the greater rainfall and lesser sunshine would result in the beans growing far faster than the maize, meaning they had nothing to grow up. Even if the maize did grow quickly enough, our climate makes for very leafy beans which would blot out the sunlight from anything they climbed up.
  2) It requires a lot of space to do properly. Every guide I've seen suggests a minimum of a 3m² space minimum - I had 1m² maximum.
  3) I don't like squash.

Minor details aside, I decided to try this out for myself. The plan was to grow green beans (up bamboo canes) in an arc at the back corner of the bed so they wouldn't shade out the other crops. The sides of the bed would be lined with blocks of pre-grown sweetcorn seedlings, while at the front corner, I would grow a pumpkin on a mound of compost. Granted, this loses a lot of the effect of the Three Sisters - the seeds won't all be sown in the same mound and the beans won't be growing up the corn, but it's still three disparate crops growing in the same bed and improving each other.

Things got off to a rocky start - I bought a set of twelve sweetcorn seedlings from the garden centre and planted eight of them in the bed. All eight I planted died within a fortnight, eaten by slugs and other predators. Thankfully, I'd kept the last four from the set and potted them up, just in case, so I was able to plant those and watch them die within a couple of days. Cursing, I bought another set of twelve... only for those to suffer exactly the same fate. At the same time, the green beans that I'd planted had sprouted, grown big and strong and put out thick leaves in order to be stripped back to the stalk by whatever was eating the rest of my garden.

Thankfully the third set of sweetcorn and the second planting of beans survived long enough for the copious amounts of slug pellets that I'd been carpeting the garden with to put a big enough dent in the local parasite population. Which led to this situation at the start of this month:

Which has now developed into this:

I am actually in danger of getting corn out of this, which is very cool. Partly because it's a new and exciting first foray into grains, which is cool, but also because I'm not the biggest fan of sweetcorn and I'm reliably informed that it tastes worse the longer its been picked. So corn that's in the supermarket tastes very different to corn that's just been from its soil untimely ripped, which vindicates my decision to grow my own rather than buy it.

Hopefully I'll like fresh corn, else this will be a bit of a failed experiment regardless of the yield. I'm already putting effort into growing pumpkins that I already know I don't like the taste of. My wife wishes to have one to carve for Hallowe'en and I'm helpless before a mild whim of the lady. Plus I didn't realise until it was far too late that courgettes would've filled exactly the same companion niche and so I could've grown something I actually liked instead. Oh well.

PJW