United States Edition

Glassy Potatoes - How to Prevent?

  • The_Shroom 108 plants South Africa14

    I have harvested some potatoes from the garden. I have had a few problems with glassy potatoes: they are hard translucent and not very palatable – even after cooking. Here is an example of what some of them looked like.

    I searched the internet on why you can get glassy potatoes: apparently they do this when they start to sprout and grow shoots/roots. I couldn’t really find anything else useful.

    Is this true and if so do I just use all potatoes presenting signs of sprouting as seed potatoes?

    Can I prevent glass potatoes or should I just harvest earlier?

    Posted about 1 year ago | Last edited about 1 year ago
  • PaulP

    Folia Helper

    Folia Supporter
    75 plants United States5b

    Do they taste more sugary than starchy? Temperature extremes will do that – extreme hot or extreme cold. Put a potato in the refrigerator and it will end up looking like this. In the garden a week of extreme temperature will do this.

  • Posted about 1 year ago
  • 151 plants United States6b

    Hmm – I was planning on waiting until the first frost to harvest my potatoes – should I start now?

  • Posted about 1 year ago
  • 108 plants South Africa14

    I was wondering whether it was climatic induced or not. In SA we usually grow potatoes in summer (they go in the ground in August) – the one in the picture is from last summer’s tubers that I missed during the harvest. They came up during this winter and I thought I’d leave them and see whether we get a decent crop or not. It has been a hot winter so far in SA (above 15oC this year, usually well below 10oC). The summer crop potatoes also had some glassy ones – and we did have really bad heat waves.

    Some of them were a bit sweet (but not glassy) and the glassy ones don’t have flavour at all.

    I had some millipedes feeding on the potato tubers in summer – might the glassyness also be a response to herbivory?

  • Posted about 1 year ago | Last edited about 1 year ago
  • PaulP

    Folia Helper

    Folia Supporter
    75 plants United States5b

    @ruthiebaby88 – I harvest mine when the tops start dying back. If you wait too long they won’t be as, um… high quality as they could be. Some may rot.

    @The_Shroom – bugs causing this problem? Nope.

  • Posted about 1 year ago
  • 151 plants United States6b

    When do you usually see the tops dying back? Summer? Fall?

  • Posted about 1 year ago
  • 108 plants South Africa14

    Thanx PaulP! I will be more vigilant with potato harvesting and keeping an eye on the weather :)

    I tend to harvest my potatoes three-four weeks after the flowers have died.

  • Posted about 1 year ago | Last edited about 1 year ago
  • PaulP

    Folia Helper

    Folia Supporter
    75 plants United States5b

    @The_Shroom – ah, you likes ‘em tender. “new potatoes” is what they’re called. LOL

    @ruthiebaby88 – Depends.

    The folia plant page for “potato” (sans variety) gives a good overview. It depends on what variety you’re growing. My desiree potatoes have a bit more to go, they take about 5-6 months from start to finish. Check the Plant Database for particulars on your favorite.

  • Posted about 1 year ago
  • 108 plants South Africa14

    Oh! Goodness – I have to confess, I don’t really have a ‘variety/cultivar’. You can’t get seed potatoes to buy in SA (or at least not reasonable amounts – try 20kg of spuds! Way too many potatoes then). So mine are store bought ones that have made shoots (the stores just label them ‘potato’) – one of the reasons why my yield isn’t as great as it should be :)

    Will definitely check out the overview page! Thanx.

  • Posted about 1 year ago

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