cooking In many countries avocados are used for milk-shakes or added to ice creams, but in the UK they are more commonly used for guacamole or in salads & sandwiches. Try mashing with lemon juice, salt & pepper & spreading on toast. storage Avocados will ripen after picking. To speed up ripening put in fruit bowl with a ripe banana. varieties/season Our avocados are grown in Spain & Mexico. Varieties include Fuerta, Bacon & Hass. The main European season is from October to April.