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  1. #601
    Join Date
    Sep 2011
    cape town
    Thanked: 107

    Default Re: Groente Tuin / Vegetable Garden

    Quote Originally Posted by bertus View Post
    Lettuce does not like heat but some can. Google Livingseeds- Heirloom seeds.
    Lettuce under shade cloth

    • Lettuce

    Three colours of shade cloth (black, red and green) with a density percentage of 50 were used in an experiment. As a result, the length and width of the lettuce were significantly bigger under the red shading compared to green shading. It has no significant difference in the control treatment under black shade cloth.
    Moreover, it shows that the lettuce has the largest stem diameter under the red shading compared to shade cloth with different colour. It means that using red shade cloth is suitable for lettuce than other coloured shade cloths
    interesting. I had no idea about this. The beginning of 2019 I decided to cover most of my yard with shade cloth as my veg took a beating that summer. I settled on 50% shade after looking up greenhouses. I could only find green shade and well, my veg are doing much better.

  2. #602
    Join Date
    Dec 2007
    Thanked: 288

    Default Re: Groente Tuin / Vegetable Garden

    I think the whole Cape suffers from high UV and not least high heat in summer.
    Choose your vegetables carefully
    The following edibles can grow with less than six hours of sun a day. Experiment with them to see what works best in your garden.
    Herbs: asparagus, celery (in temperate to hot areas), coriander (cilantro), fennel, lemon balm, mint, Jerusalem artichokes (semi shade under deciduous trees), oregano, parsley (in temperate to hot areas), rocket, rhubarb (grows tall and succulent in semi-shade, especially in hot areas), sorrel, salad burnet and watercress.
    Alliums: chives, garlic chives, garlic, onions and leeks (hot summers only – good under deciduous trees)
    Leafy vegetables: lettuce (in particular the cut and come again varieties), kale, cabbage, oriental greens (pak choi, tatsoi and mizuna), spinach (dappled light in hot areas) and ornamental chard (and other chard varieties that are more shade-tolerant than the common Fordhook Giant).
    Root vegetables: beetroot, carrots, potatoes, turnips and radishes grow better if they receive afternoon shade, especially in February, which can be the hottest month of the year. In hot summers potatoes can be grown in dappled light under trees or pergolas.
    Fruiting vegetables: in very hot climates and during the hottest time of the year, capsicums (chillies and sweet peppers) do best with morning sun and afternoon shade. Generally, however, fruiting vegetables tend to require more sun, because the fruit needs to be exposed to the sun to ripen. One strategy is to train squash and vine tomatoes upwards using a trellis so that the roots are in the shade while the top growth gets sun.

    And when it’s too hot…
    In gardens where there is extreme heat and too much sunlight, vegetables can be grown successfully under 20% to 40% shade cloth, however, monitoring is necessary because one doesn’t want shade when there is a succession of overcast days. This means setting up a system where it is easy to pull over or remove the shade cloth. It can be as simple as putting a pole in each corner of the bed, and securing the shade cloth to the poles with pegs (again, experiment until you find a solution that works best for you). The benefit of shade cloth is that it screens out the harmful UV rays. Humidity has the same effect, because it deflects the UV rays. This is why veggies grown in hot tropical areas experience less heat stress. Fruiting vegetables, such as tomatoes and peppers, will perform better under 20% shade cloth, while leafy vegetables can take 40% shade cloth.

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