This white skin and flesh variety is significant for the washed market in South Australia. Crystal was imported from the USA and has good skin colour and shine when dug from sandy soils and washed. Skin maturity for mechanical harvest can take an extra 7 to 10 days longer than Coliban. It has produced good skin colour in Mallee winter crops. Exton consistently produces high yields of tubers suitable for washing.
Plants have thick stems, are very robust and resistant to wind damage and metribuzin.
A major variety for both the washed and brushed markets in Australia. Sebago produces good yields and is a reliable cropper. Lenticels are often brown in colour, prominent and detract from skin appearance. In South Australia this variety is used mainly for brushing because its skin colour is usually inferior to Coliban when grown under the same cultural conditions. Generally has a bright red skin with a lightly cracked skin finish.