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spuds under polythene

I was thinking of planting my spuds under black polythene this year as I find earthing up a pain in the wotsit! Has anyone tried this and does it work? Any tips would be very welcome.


  • Lupin 1Lupin 1 Posts: 8,916

    Winniecat they grow upwards towards the light image

  • DovefromaboveDovefromabove Central Norfolk UKPosts: 63,867

    The earthing up isn't just to keep the light out and the potatoes from turning green - it actually increases the yield as the more of the stem that is underground the more potatoes it grows.

    Farmers used to use polythene over potatoes to keep frost off and warm the soil, but I'm assured by my brother (large potato farmer in every sense of the word image) that fleece produces better crops that also store better due to more even uptake of water.  They only use fleece now for potatoes.

    “I am not lost, for I know where I am. But however, where I am may be lost.” Winnie the Pooh

  • WinniecatWinniecat Posts: 100
    Ok. I won't be using polythene then! Thanks for the replies everyone.
  • Blue OnionBlue Onion Posts: 2,433

    You could try using straw to 'earth' them up.  I've not used that method, but I've seen it recommended as an alternative in various magazines.  It would certainly be less work.

    Here is a link to an experiment in France between mulching with straw versus traditional 'earthing up'.  In general they seemed to produce less, but there was plenty of success stories too.  Those that had similar outcomes between the two methods much preferred using straw mulch.  

    Utah, USA.
  • barry islandbarry island Posts: 1,054

    I generally dig a trench about 6in deep place the seed potato and give them a covering with compost and a few slug pellets for good measure then refill the trench with the removed soil taking a bit extra from the ground at either side of the edge of the trench, this builds the trench covering up to about 6 to 8 inches high, that is generally about all the earthing up that is necessary but as the buds show through I just scrape a bit of soil up and cover them over and that's as far as my earthing up goes and I've never had any problems.

  • WinniecatWinniecat Posts: 100
    Some great tips there. Thanks guys.
  • WelshonionWelshonion Posts: 3,114
    The earthing up is also to raise the temperature of the soil. The sun shines on the sloping sides.
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