PDC Archives - Page 2 of 3 - The Desert Echo

4 YEAR CROP ROTATION FOR A SPOTLESS LIFE

September 2, 2011 19 Comments

Detail of trees on the plan for the Permablitz in Coburg, Australia

Watercolour plan for the Permablitz in Coburg, Australia

Bright eyed and bushy tailed we began our gardening adventure in July last year and of course we made the kind of mistakes that seasoned gardeners would snigger at such as planting 10 broccoli and 10 cabbages in a metre square. But that was easy to fix. When the bed bulged embarrassingly with bounty the chooks had a delicious snack on our excesses.

However one thing confounded us. At first the tomatoes we planted in the front garden grew just as happily and just as fast as the ones out the back, all of them delighting in the summer sunshine, but then EPIC FAIL! The ones out the front got one then two then a veritable patchwork of horrible yellowy brown spots! They shrivelled away. We ran to books and blogs to work out why. Apparently before we moved in, this north facing position had been prime tomato territory and this was our first introduction into the need for crop rotation.

Just as you would become malnourished if you ate nothing but tomatoes and potatoes, growing things from the same family year after year in the same spot will create an imbalance in your soil. Plants from the same family such as Solanaceae (that’s your tomatoes, potatoes, eggplants, capsicums and chilis) have similar nutrient requirements so they will strip every last bit of these from the ground. But more importantly rotating your crops reduces the spread of soil-borne diseases and pest problems as these guys attract the same nasties.

So here are the four main groups we suggested for the Coburg Blitz:

Plot A: Umbeliferae (carrots, celery, parsnip, coriander, etc) followed by a green manure in the cooler months to replenish the soil for the next year’s crop

Plot B: Solanaceae (tomatoes, eggplants, capsicums, potatoes, etc) which are very nutrient hungry with Alliums (onions, garlic, leeks, etc) in the cooler months

Plot C: Legumes (peas, beans, etc) that fix nitrogen in the soil ready for a nutrient hungry crop to follow

Plot D: Brassicas (broccoli, cauliflower, cabbages, brussels sprouts, etc) that need a nutrient rich soil

And the next year the nutrient restoring crops will be replaced by the nutrient depleting crops. The root crops following the nutrient depleting crops, as too many nutrients in the soil result in very bush leaves, but disappointing roots.

The beauty of this system is that plants not in these main families such as many herbs, flowers, lettuces, beetroot, silverbeet and spinach can be mixed in amongst each plot to allow all plants to benefit from companion planting. For a full list of the plant family groups I recommend checking out The Seed Savers Handbook. This system is really ideal for a sharehouse, where each housemate can look after a bed themselves and not have to work about other people growing things that will cross-pollinate with their produce come seed saving time. I’m excited about suggesting this to my housemates … but first 1 Permablitz down 2 more to go until we can do our own garden!!

Explanation of 4 year crop rotation with reasons for the order of plants for the Permablitz in Coburg, Australia

Click on the images above to view larger on my flickr.

Please comment on this post if you found it helpful, I’d love to hear about your gardening adventures!

Garden

THE COBURG PERMABLITZ PART 2 – ESPALIERS & BEER

August 30, 2011 No Comments

Bluestone retaining wall and mulch path at the Permablitz in Coburg, Australia

After an incredible lunch of beautiful curry, rice and roti and a quick swig from our personalised cups we set out to get this thing done!

We had reached that satisfying point where, the really hard slog finished, things began to quickly take shape. The paths greedily gobbled barrow after barrow of mulch and garden beds brimmed with compost and a lucky few got their comforting layer of mulch.

The poles for the espalier supports went in nice and deep. A young permablitzer observed the 700mm footings and wryly asked whether we were expecting a tropical cyclone. Our numbers diminished as the day drew to a close, but the few remaining were gifted for their dedication and got to watch Adam’s espalier workshop and have a nice cold beer. Or in my case greedily devour the remaining cheese and fruit salad.

It will be amazing to see when the garden is planted out and lush. Perhaps with some mechanical help those palm roots can be put in their place and the pond canbrim with fishies and frogs. It was such an exciting experience to see our plans take shape. What a dedicated group of amazing workers!

Garden

A PERMABLITZ IN COBURG PART 1 – BRICK SOLDIERS & PALM ROOTS

August 30, 2011 1 Comment

Dylan and I arrived at Gigi’s at 8:30am, welcomed by concrete rubble and pavers erupting from the earth. The compost and mulch piles loomed ominously at the back gate, the stairs presenting a cheerful bottleneck for the wheelbarrows. The delivery men had meant to deliver half of the mountain to the front. But Dylan and I were naively unperturbed, despite or perhaps because of never attending a Permablitz before and finding ourselves in the driving seat. So I attribute the smoothness of the event to delicious beginner’s luck and the dedication of Adam Grubb of Very Edible Gardens and the lovely group of people who turned up to sweat it out digging holes and untangling the terrible mat of roots where the palm tree once stood.

Amongst the rubble we discovered a treasury of worn bluestones that my amazing team of retaining wall builders jigsawed together. In the background four grim faced mattock wielders had the unenviable job of trying to cut through the unmoving mass of palm roots to cut the path. Leaving me with the cringing feeling of being a prison guard driving a chain gang they broke through the mass with what seemed like sheer strength of will and sweat rolling down their brows. Like soldiers on parade the brick edging quickly fanned around the edge of the path waiting for its mulch filling.

Garden

RUTHLESS PRUNING – JUNE IN THE GARDEN

June 30, 2011 No Comments

June has been a slow month. Our potato plants began to die so we started digging up their little red treasures. Our PDC lecturer inspired us to buy some bare rooted trees. We bought an almond from St Erth to grow up and hide the flats and a nectarine because it rates as one of my favourite fruits. The almond is going to share its plot with a sweet little kiwi berry and some spring bulbs. Dylan pruned the poor almond down to three branches, but come spring the sad little twig should sprout into an abundance of leaves and flowers…fingers crossed. Perhaps his min swale will help it flourish.