Monday 27 January 2014

Is Green Manure just really Green Poo?

Wonderful blistering hot days, humidity that feels like we should be living in tropics, rain and winds that blow your roof off then cool days that make us wonder if that 50 degree day was just in our imagination. 

This is what it feels like to live in Ipswich in the summer. 

How would you fare in this weather? Hot, bothered, quick tempered? 

I know I've been struggling, the smallest things bother me. 

If I had a vegetable patch right now, I know I'd be pulling most of it up. 

If the heat didn't kill everything off, the humidity probably would have. 

In years past when I have had a vegetable patch in summer I have suffered with burnt leaves, white mould all over my cucumbers, tomato blight and then to top it all off grubs in my fruit (from fruit fly stings).

Which is why at this time of year I always sow a summer green manure crop. 

Green manure crops are crops grown not to be harvested but instead to be incorporated into the soil before they reach maturity to contribute to the health of the soil. 

It is an old technique of soil management that seems to have been forgotten by many gardeners and farmers. I think it's because we are no longer aware of the proven benefits and cost effectiveness of green manure crops. 

Trevallan Lifestyle Centre stocks Eden Seeds, a seed company that only stocks old traditional open pollinated varieties of seed, preferably old Australian varieties and organically or bio-dynamically grown where possible.  The green manure seeds packs contain a mix of seeds.

Green manure crops contribute directly to the fertility of your vegetable patch through the supply of important plant nutrients. Legumes, for instance, supply nitrogen because their roots form an association with soil-borne bacteria that can transform nitrogen from the atmosphere into nitrogen compounds that can be used by plants. Isn't nature wonderful? It's also just saved you money as now you don't need to add as much fertiliser to your vegetable patch.

Green manure crops can also contribute indirectly to nutrient supply. Just the process of decomposition of the crop aids in making further nutrients available that are already present in the soil but in a form that cannot be used by plants.
 

After the plants have grown and you incorporate them back into the soil you are supplying vast amounts of organic matter that is usually supplied by organic mulches. Once again saving you money - no need to buy organic mulch. 

Drought resistance can also be improved as a lot of the crops are very deep rooted. Their roots can penetrate the subsoil and open it up. Next season's crops can also obtain plant nutrients from the subsoil once it is opened by deep rooted green manure crops.

So this weekend get dirty and take out all your hot weather anger on your vegetable patch by pulling everything up and planting some green manure crops. 
 

Your winter vegetables will thank you.

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