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PRO
We were warned yesterday to expect water restrictions in some areas of the country as the lack of rain depletes water supplies. Planting during the summer isn't ideal but it has been made possible by the use of irrigation systems and of course the hosepipe and overhead sprinkler. Yesterday saw the start of planting of over 4,000 plants and trees at the Olympic site in London and even though they are planted in 'wetlands' they will need to be watered whilst they settle into their new environment and during periods of stress when temperatures are high. There are ways of maximising water retention;
  • Adding of organic matter in the top 30-60cm of top soil so that water is held and made available to the plant (also helps to keep the roots cool)
  • Mulching the immediate area above the root-zone to reduce/minimise evaporation from the soil.
  • In the case of plants - close planting shuts out the sun and stops it heating the soil surface or in the case of trees, under-planting with low ground covering shrubs or allowing grass to grow longer will help to maintain soil water levels.
What's your standard practise during the summer months...do you?
  • Avoid planting at all during the months of increased temperature and reduced natural rainfall?
  • Introduce good practise in respect of soil and root-zone management?
  • Only design in and plant trees or shrubs that are capable of withstanding prolonged periods of drought?
  • Water in well on planting and only applying the minimum of water during the first few months.
  • Plant and forget and hope the plants come through?
  • From your experience, what tips or tricks would you give a fellow professional or DIY gardener on the best way to manage a planting programme and ongoing irrigation?

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  • We have planted over 700 packs of bedding this year, and here in the northwest the hosepipe ban is set to arrive next week. 

    The plants are really suffering and with alot of the commercial contracts we do being new builds and show homes they have no outside taps.  We add in our contract that we cannot be held responsible for the watering of them, Which is a huge relief!!

    On the fylde coast where we are from the soil is very sandy and all the lawns are pure brown with no green at all, I think with the hozepipe ban and no rain for 9 weeks there is not alot we can do, even after 19 yrs gardening you still feel responsible and it gets you down. 
  • PRO
    Telegraph - Can we really be short of water?
  • PRO
    " even after 19 yrs gardening you still feel responsible and it gets you down."

    I know what you mean Martin.

    Coming out of winter into spring is such an exciting time. Plants and lawns are full of life and we feel as though all the wrongs have been put right...and then the summer and the ravages of drought that seem to undo all of the good work.
  • PRO
    Notwithstanding the use of plenty of organic stuff everytime we plant anything, we also use a product called raingel which whilst similar to other watergel products, is much more effective.

    We have been using this product for 4 years now, its very effective where our clients notably forget to water or can't water baskets & pots daily. But we have also used it directly in the garden soil.

    See this website for an explanation, http://www.plant-watering.com/prod-detail.asp?pid=1&producttype..., we got ours from LBS, and 1kg goes a long way.
  • PRO
    Andrew/Geoffrey

    I did some contract work for Blackmoor Golf Club many years ago.

    Grass wouldn't grow on the bumps and mounds on the apron around the sixth green so we hollow tined and top dressed with water retaining crystals mixed into 70/30 fine washed sand and sphagnum moss peat mixture.

    The theory was sound but after a few days of irrigation the tine holes started to ooze the swollen jelly:-))

    It took weeks for this to settle down and in the meantime, the ground staff had to go and sweep the mess up.
  • PRO
    Ah, but was it super duper 'Raingel'. This stuff is a really fine powder, about the same as a table salt. Whereas the other watergel products, yes they produce the slime effect.

    Philip Voice said:
    Andrew/Geoffrey
    I did some contract work for Blackmoor Golf Club many years ago.
    Grass wouldn't grow on the bumps and mounds on the apron around the sixth green so we hollow tined and top dressed with water retaining crystals mixed into 70/30 fine washed sand and sphagnum moss peat mixture.

    The theory was sound but after a few days of irrigation the tine holes started to ooze the swollen jelly:-))

    It took weeks for this to settle down and in the meantime, the ground staff had to go and sweep the mess up.
  • PRO
    Maybe some of the 'green' lawn enthusiasts could be encouraged to let things proceed more naturally, instead of watering grass during dry weather.
  • Ok so the horse has already bolted and water shortage is on the horizon but at Green-tech we are finding that more and more big projects and large contractors are getting prepared for this eventuality when designing and installing their planting projects.

    Green-tech's Mona Irrigation System sits at the roots of your plants and trees and irrigates from the roots upwards. Generally plants get their water from the ground. Water moves through the soil to the plant by means of capillary action. By installing the Mona Irrigation system prior to planting aids this capillary action, water is stored in the subterranean Mona reservoirs and the roots absorb the water as required.

    This system prevents over and under watering, reduces watering frequency and improves root development.



    Take a look at the diagram attached to see how the system works.

    Green-tech
  • I never plan to plant in July and August, - never have, but now it's great because that is the summer holidays, so I can have some time off with my lad, and just work a couple of days a week. That said, - with July coming up fast, i've been working all hours to get ahead, and as we've had such dry weather at this time of year for the last couple of years (The roof at Wimbledon hasn't been used in anger yet has it!) i've developed the following strategy for planting projects.
    I always take into account the soil. - most in our area is very free draining and chalky, so no use adding in Lobelia Cardinalis, or Hydrangeas or Actea. The plants I use will be fine in all but the driest conditions when they have established
    I Always manage customers expectations, and let them know that they will have to water in the first season.
    I always buy quality plants, - why would you not buy the best if you aren't paying for it?
    Soil and border preparation -
    week 1 - Prepare planting beds, by taking out weeds, unwanted plants and all root. Dig in well rotted organic matter. Then when you have an almost empty bed, - leave it for a week and ask the client to put a sprinkler on it for at least and hour, 3-4 times in the week
    week 2 - come back to wonderfully prepared damp soil, that has already been turned over, that has worms starting to come back into it, and is wonderfully quick to plant in. - When planted, I water in everything with a hose lance before I leave, giving everything a good soaking, but without washing away the soil from the rootballs, - then ask the client to repeat with the sprinkler 2ce a week for the next 2 months.
    When sending the invoice, I send written instructions on watering, as I have instructed them.

    I've been doing planting projects for 6 years, - I guarantee all my plants for 2 years, and have had to replace about 15-20 plants from the 96 projects (total number of plants in 1000'2) that i've done in total over the years, with this planting method.
  • I saw a bit of of granular lawn feeding going on last week, but had the chance to bring the subject up with the neighbour, who will no doubt mention this to the client in question. It's a residential site I maintain and have advertised myself to the domestic side having noticed a lawn franchise turning up a couple of times.

    Why do they do it? I guess these people also go to tyre franchises for their tyres and pay well over the odds for shoddy service.

    I have planted a number of plants lately, often in clay soil, and everything has taken very well so I'm pleased. I do water a lot, advise watering and always use a bit of feed and try to dig in manure where possible.
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