Yulli’s Rooftop Garden Part 2: Overcoming problems

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So this project has 2 parts: A rooftop part that is out of sight to members of the public and patrons and a visible part, the outdoor space at the back.

The rooftop was something Karl had already made a start on with a few polystyrene boxes growing some ginger, spinach and parsley.

Early September and a few of the wicking planters have been installed and planted

When Karl approached me about the job, he told me the roof was going to be a tough spot as it really gets nailed by the sun. He wasn’t wrong. It’s a tin roof and it really cooks up there.

As part of my response to the brief, I chose to continue with the polystyrene boxes because the garden was out of sight, polystyrene offers great insulation and of course, it’s a waste stream item for a restaurant.  However, I realised due to a lack of handy water (the nearest water is the bathroom through the door down the hall a bit inside) that S.I.P.’s or wicking beds were probably the best way forward.

Early November and the first plantings are coming along, companion plants are in. The sun is yet to have it's full impact.

Early November and the first plantings are coming along, companion plants are in. The sun is yet to have it’s full impact.

Species getting the first run were basil (lemon, thai, sweet, liquorice), mint (apple and a variety already up there from Karl’s first attempts), lemongrass, pineapple sage, pumpkin, courgette, passionfruit and a rosemary or two. I like to try a range of species and then see what does well so that in subsequent seasons, those can then be concentrated upon. As we progress, cultivars can be varied and seeds saved to develop site-specific hardiness.

mid spring 2011 on the rooftop of Yulli's

Life is emerging but not exactly booming as it should… You can see the cardboard ‘cut to shape’ mulch concept. An effort to ward off the drying effects of the sun with resources available.

As the entire garden is sitting on a rooftop over the coolroom and back room, I was concerned about the overall weight of the garden so decided that the soil/media needed to be lightweight to make up for the heavy reservoirs that would fill with water.

A native bee attracted to the Yulli's rooftop by planting some 'good bug mix' seeds

A native blue banded bee. It’s a joy to garden with these cute little guys around – they’re one of 3 native species I’ve noticed since adding companion plants

As it turned out, this may not have been the best of ideas – using perlite as a principle component in a garden bed system isn’t something I had done a lot of. I made some enquiries and thought I had it covered: 1/3 perlite, 1/3 compost, 1/3 potting mix. Sorted. Not quite. Pushing the sustainability envelope further I opted to use shredded paper for mulch and also some cardboard cut to shape in others. This on it’s own isn’t a bad idea but when combined with some less than premium potting mix – a bad idea albeit from good intentions.

I found the closest source of potting mix was the Coles in the Surry Hills Shopping Centre. Folks I’m here to tell you that their potting mix is terrible – lifeless sawdust with some finely grained black stuff, not really soil like at all. I thought my compost from home would make up for any shortcomings of the potting mix but this was not the case. It turned acidic.

After making the amendments, the plants are looking a little happier

After seeking some advice from a rather well known bearded fellow, I applied his advice of doing a soil test and making the appropriate pH amendment (as it was acidic, I sprinkled some dolomite lime, then applied cow manure and lucerne. Within a week, the basils were all leaping out of the planters. Success!

Finally an abundance of herbs for the harvest! Maz harvests basil, stevia and mint for the restaurant

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Categories: Bars & restaurants

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2 Comments on “Yulli’s Rooftop Garden Part 2: Overcoming problems”

  1. rebekah
    April 17, 2012 at 8:49 am #

    looks great, what companion plants did you choose?

    • April 17, 2012 at 10:07 am #

      Hi Rebekah,

      Thanks for the question.

      I used Green Harvest’s “Good Bug Mix”. It includes red clover, lucerne, cosmos, sweet alice, dill, caraway, coriander, buckwheat, baby’s breath, Queen Anne’s Lace and marigolds.

      I recommend not sowing these into your beds directly as they can take up a great deal of space. Instead, plant in small containers around the garden. That way you can move them if they start to shade out your crops.

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