Ipicture 9f asweet potatoe4/6/2023 Sweet potatoes have a high percentage of water in them, and this is what will speed up their ageing process. However, these times do vary a lot according to where and how the sweet potato is being kept. When kept in ideal conditions, sweet potato tubers can last for quite some time. Sweet potato tubers that are best bought fresh, preferably as close to their growing location as possible. Sweet potato tubers that look and feel like this are no longer edible and should be discarded immediately. A fresh sweet potato will have a dense texture, no discernable fibres, and be bright orange or white in appearance.Ī sweet potato that is going, or has gone, bad will be soft and mushy, or stringy, and have patchy colours with white fibres visible in the centre of the tuber. This can only be judged by cutting into the sweet potato tuber. This smell is due to the fibres and sugars within the sweet potato breaking down this can also cause small tears in the skin and a thick syrup-like substance to leak out. SmellĪn ageing or rotting sweet potato has a distinct aroma first it will smell sweet, the sour, and ultimately the smell will become akin to pungent compost. It can appear as either a grey/white bloom or as a grey-green fur this can be peeled away from the flesh of the sweet potato before cooking, as it will not affect the flesh.īut, if there are any black rot spots, this is a key sign of a fungus that has infected the sweet potato, and it should be discarded immediately – it is unwise to ingest this rot, as it can cause stomach upsets, and will taste unpleasant. They’re usually caused during growing, by fluctuations of moisture and temperature, and aren’t something to worry about – they’re perfectly safe, but the tuber will be less dense and lack flavour. These can be found on the surface of the skin, and inside the flesh when cut. If left to grow, these sprouts will develop into roots, and if planted in the soil will eventually produce leaves and more sweet potatoes. Will start to appear, usually from the ‘eyes’ of the potato. Inside that purple skin, the white flesh will become yellowish and slowly absorb the purple from the outer skin. ![]() However, the purple-skinned sweet potato will turn from shades of red to dark purple as it ages. ![]() The more common orange-fleshed sweet potato skin will turn from its grey-brown colour into a darker brown or even black. The exterior (skin) colour of the sweet potato will begin to change this can vary across different sweet potato varieties. Once these spots appear, it’s a sure indicator that this sweet potato should be eaten as soon as possible. Older sweet potatoes will develop small brown spots, about the size of the tip of your little finger. All of these signs are noticeable without cutting into the tuber or having to taste the sweet potato. 4 To Sum Up How to Tell if a Sweet Potato is BadĪs sweet potatoes age, they develop several key signs that indicate they’re beginning to turn bad.
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