Container Garden: Using Spent Compost

In urban areas, growing in containers and raised beds on rooves, terraces and patios is the method of choice.  Compost is really quite expensive and I don't like spending money needlessly or throwing away anything that can be recycled or have a second life.

I don't throw away spent compost but I do make a note of what has grown in the soil most recently.  For example, if I have grown something from the solanaceae (potato family) I ensure I do not grow anything from the family in the same soil when recycling it - in fact I will try and find a legume to grow in the soil next following the crop rotation rule of legumes following the potato family.

In the second hand soil, if growing something that's a hungry plant (e.g. pretty much anything except roots)  I add a generous portion of vermicompost, the beautiful black compost that my wormery makes and mix it in well with the secondhand soil.  If you are lucky enough to have the space for a traditional compost heap or a darlic composter this will be great too.

This saves me a lot in valuable compost - but using this approach you do have to be very mindful of  crop rotation and what's been growing in the soil before.

When growing perennials, I change the soil annually - especially for tree onions and kai lan which can be prone to disease.

I don't usually extend the use of compost past two growing seasons and usually just dispose of it in the borders where my landlord's shrubs live and I sometimes grow salads in the dappled shade under the small trees and shrubs and they grow really well in this third hand soil.

In theory I think you could just keep continuing to extend the use of growing in the soil by adding feed or vermicompost but it gets difficult to keep track of the compost after about two seasons which is why I stop using it in containers after that point.  I feel sure it can be done, but you would need a good system or to keep good records to keep track of which soil is where and its history.

Do you have any techniques or systems for using spent compost?  Would love to hear other approaches.

2011 saving money with a small garden

 

In 2011 I saved £172.45 through growing my own food.  With what I have learned over the last year I am sure I can increase that saving this year!

I only recorded savings between May to December as that was when I was initially inspired to find out how much I actually save with growing my own food.

May

In 2010 I hadn't really learnt to grow many things to eat over the winter months as yet with chard being my main winter crop so until May this was really all that was growing outside together with the perennial herbs.

The saving for this month was £2.21 which consisted of salads, herbs, peas, turnips and some cabbage.

June

Things were starting to pick up a bit in June and I was able to more than double those savings to £5.34.  The spring sowings were planted out and starting to crop.

Crops I was eating in June were salads made with kai lan, chard, nasturtium leaves, pea shoots, mustard leaves, squash flowers, etc.  I was making herbal teas with mint and lemon verbena.  My crop of early potatoes were ready to eat and the potato bag produced nearly a kilo of salad potatoes - now that was a crop I savoured!  I was also eating french beans and peas.

July

Savings continued to grow in July when I saved £7.90.  I had similar crops to June except for the potatoes - I was then waiting for my second batch of earlies which were being grown for my boyfriend's  rest & recouperation break from a tour in Cyprus in August.  There were also some new crops that came in to season: courgettes started to crop, patty pans and strawberries in hanging baskets.

August

The savings took a wapping jump to £72.51!  It includes gifts of 800g chard and 3kg of tomatoes saved from blighted crops which were given in return for volunteer gardening maintenance in a community garden.  As this was free food I included this in my savings.  In addition, it highlights one of the major benefits of joining or helping out in community gardens - free food!

What was eaten in June and July continued to crop and with the addition of  chillies and sweet peppers, aubergines and tomatoes.  Interestingly these are all in the same crop family - Solanaceae.


September

The savings were pretty similar to August coming in at £62.53.  Again, a little generosity inflated my crops as a friend gave me 500g windfall apples which I turned into my first ever jelly - it was delicious and set marvelously.  All the crops in season in August were still producing in September just slightly less prolifically.  We had a really hot week at the end of September/early October - unfortunately I had already removed my tomatoes due to the blight experienced in August which would have done really well in that heat.

October

Things really started to tail off this month at £15.81.   Although, keeping that saving value high were the winter squashes.  The summer in 2011 was disappointing with not much sun but in mid to late autumn, temperatures were remaining stable at about 15 degrees centigrade which was ideal weather for the winter squash to fully finish on their vines before being cropped.  With the mild weather, tomatoes and chillies were continuing to finish cropping and winter salad was starting to be substantial enough to eat.

November

The year was really starting wind down now with £6.17.  Chillies and sweet peppers were still cropping and kale, cabbage, kai lan, nasturtium, chard and winter salad were this month's crops.

 

It has been a brilliant exercise recording all my crops and their weights.  Its given me something solid to reflect on.  Through the data I can see which months things were cropping in a challenging summer with little sun.  It also made me realise what foods were expensive and which ones were less expensive.  It told me that with a container garden it makes more sense to grow the high value crops that I can get a good yield from.

For 2012, I have decided to capitalise each season on getting the most value from my plot.  I will grow the expensive Solanceae through the summer and concentrate more on brassica types through the winter.  I will grow what grows easily in pots and not invest too much space in those crops that don't fare well in pots.  I found turnips were a disaster and peas were difficult.  However, I think I will still grow a pot of peas as they are like sweets in the garden!

From the summer, I will be planning my winter crops better - I was starting to do this in late summer 2011, but I will give this more focus in 2012 and sow some kohl rabi good and early.  I will experiment with a different variety of kale to see if I can find a favourite as this grows so well in winter and I find it easier to grow in containers than cabbage.

Lets see if I learn from 2011's data and really improve my savings and crop yields this year.  Watch this space!

Here's the Spreadsheet if you would like to see the results in more detail.

Have you done an exercise to record your crops?  I'd love to hear of your experiences.