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Potting a Rhododendron into container - advice

TerrysWorldTerrysWorld Posts: 174
in Problem solving
Over the last couple of years I have lost 2 Rhododendron's which appear may have been from Root Rot.
Despite having a layer of crocks in the base of the container and using Ericaceous soil also, in last 2 they were winter stored in different positions. First winter against house north facing wall for for plant to die and this last winter on the patio sheltered from winds and frost but open to rain/showers and this one also died. Both in the Spring of 2021 and 2022.
So I have another plant from a reputable garden centre and dont want to loose another.
I have Westland Ericaceous soil, old broken pot/crocks and Westland Decorative Mini bark.
Could anyone advise if the soil should be mixed with the mini bark to help with drainage and if so what ratio, or should a layer of mini bark be laid on top of the crocks again aiding drainage. Or any other advice please.
Thank you
South Monmouthshire stuck in the middle between George and the Dragon

Posts

  • PlantmindedPlantminded Posts: 3,580
    I'd add a few handfuls of horticultural grit to the compost you mention to aid drainage, rather than adding bark chips.  You can place a layer of bark chips on the top of the pot to aid water retention, particularly over the summer, and deter weeds.  Also, make sure that your pot is elevated on pot feet or equivalent to ensure good drainage.  (Rhododendrons are shallow rooted and can suffer permanent damage if overwatered.)  Check the compost manufacturer's instuctions on how long the nutrients will last and feed thereafter with an ericaceous feed.  When the compost shrinks down in time, you'll need to top it up, ideally by removing the plant and adding the extra compost to the bottom.  This GW link gives additional advice which will help you: Rhododendron: Plant, Grow and Care For Rhododendrons - BBC Gardeners World Magazine
    Wirral. Sandy, free draining soil.


  • FairygirlFairygirl Posts: 55,117
    Why do you think they've rotted? It's quite hard to overwater a rhodo, unless there isn't adequate drainage in the containers. What drainage have the containers got? Are the holes getting blocked?
    Showers, winds, frost and snow, or even torrential rain,  have no effect on them, unless there's something else wrong. They need to be in a soil based mix, with good drainage, and you can add some ericaceous compost if you want. Bark is good as a top dressing.
    It's a place where beautiful isn't enough of a word....



    I live in west central Scotland - not where that photo is...
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