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Ericaceous Plants on Limestone!!

Hope you can help here - Have been asked to put some beds, raised and other wise into a garden that sits on underlying limestone . The patio around which the beds will sit has almost certainly been laid on a bed of crushed limestone as well.Can anyone suggest how I might isolate the beds from the surrounding geology and local groundwater please whilst at the same time maintaining drainage? Although the site is level the overall area is on a slope so groundwater would seep across the site. Naturally I would be importing new soil.Your thoughts welcome and thanks in advance

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  • don't guarantee the plants! - membrane terram or similar as deep as you can and get in the sulphur chips. I would also recommend putting in a mini soakaway at the bottom of each bed as an additional precaution.
  • PRO
    Hi Simon

    I would also insist that your client agrees that they would be responsible for dressing and feeding after the job has been signed over.

    I would suggest that a regular application of Sequestrene is applied too. Old tea leaves/bags and coffee grounds are good too.

    Just make sure your client understands the implications of allowing lime levels to increase.

    Hope that helps.

    Phil
  • Hamish and Phil - thanks both for the replies. Have already pointed out my reservations regarding this, but then again if it doesn't work they can always use the beds for something else! Very much like the idea of using tea bags and coffee grounds though. Whilst I will share my thoughts with them on the matter, if they really want to give it a go .....
  • Hi Simon,

    Perhaps you can suggest a couple of large planters / pots with the particular ericaceous plants your clients are looking to have in their garden? What are they trying to grow anyway? Realistically, whatever you're trying to grow will never work in a limestone border but a focal point planter might be easier to manage - you can always drench with seqestered iron (or proprietory ericaceous feed) every couple of months if you're just growing a camellia in a pot for example.
  • Hi Peter

    Can understand your reply and thanks for taking the time to put pen to screen. I am pleased to say that I am not as obviously daft as it might first appear. ( at least not from the original question) Hot well drained site - herbs, grasses, flowers were my initial thoughts but needed to get some input from the client. They came back with the Azalea and Blueberry tree raised bed route (they already have them in pots) and in fairness did ask what we might be able to do, changing soil etc. Rather than dismissing the idea straight away well maybe a little research ....

    Before going back to them I wanted to gauge reaction and ideas from Landscape Juice which I must say have been really helpful and I agree about not going against prevailing conditions. However it has shown me what might be possible with some extra thought. It will also help me to go back and discuss their ideas with them in more detail - it's not a large area so if it fails then we can always go back to plan 'A'. Possibly pots in a raised bed with elements as suggested by Hamish, Phil and Colin. Of course I have reservations but provided they realise it's a bit of an experiment then all will be well. - Any suggestions for Azalea like plants which like lime??
  • Thank Andrew and apologies for not acknowledging you in the my last post.
    Andrew Fereday said:
    Hi Simon,

    Perhaps you can suggest a couple of large planters / pots with the particular ericaceous plants your clients are looking to have in their garden? What are they trying to grow anyway? Realistically, whatever you're trying to grow will never work in a limestone border but a focal point planter might be easier to manage - you can always drench with seqestered iron (or proprietory ericaceous feed) every couple of months if you're just growing a camellia in a pot for example.
  • There are Rhododendrons that will manage in alkaline conditions - research - but have to say I agree with Peter - when I first looked at this I dismissed it. If your customer Simon, had already bought ericacious plants they must not know about such things, - tell them, as Andrew says, it'll never work, and put what they've bought in pots - pot on as they get larger - plant stuff instead that will thrive in these conditions, I'll bet thats what they'd really like. --------- Hot and dry, Cistus Corbariensis - http://www.plantpress.com/plant-encyclopedia/plantdbsearch.php?name... for one.
  • Peter - no probs at all. I asked the question and actually I thought your reply perfectly reasonable, not angry at all. It's good to get a range of thoughts on any topic, and gives me more ammunition with the client. Opinions seem to be ''not a very good idea how about trying this'' and it certainly helps with my own knowldge, which I will confess when it comes to plants is limited. It's great to get replies that are passionate and lets face I am sure it only comes from wanting to see a job done successfully and I am all for that.

    With Pete's suggestions I am now off to learn some new plants! Thank you all

    Peter Ward said:
    Hi Simon, i think i was having an angry young man moment sorry, looking at my post i was must have been pretty feverish! i came across as a bit harsh.

    anyway..last year i helped Nick henley welch on the Ilex plant database (its talked about on here somewhere, and its now totally free!) have a look on there for shrubs that dont mind alkaline conditions there's actually quite a lot.

    hope this helps
    peter
    Simon said:
    Hi Peter

    Can understand your reply and thanks for taking the time to put pen to screen. I am pleased to say that I am not as obviously daft as it might first appear. ( at least not from the original question) Hot well drained site - herbs, grasses, flowers were my initial thoughts but needed to get some input from the client. They came back with the Azalea and Blueberry tree raised bed route (they already have them in pots) and in fairness did ask what we might be able to do, changing soil etc. Rather than dismissing the idea straight away well maybe a little research ....

    Before going back to them I wanted to gauge reaction and ideas from Landscape Juice which I must say have been really helpful and I agree about not going against prevailing conditions. However it has shown me what might be possible with some extra thought. It will also help me to go back and discuss their ideas with them in more detail - it's not a large area so if it fails then we can always go back to plan 'A'. Possibly pots in a raised bed with elements as suggested by Hamish, Phil and Colin. Of course I have reservations but provided they realise it's a bit of an experiment then all will be well. - Any suggestions for Azalea like plants which like lime??
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