Largest of all Californian apricots, but of outstanding eating quality, and the fruit variety we have gone to greatest trouble to secure and maintain. Truly enormous, to four inches in breadth, deep orange, with the same rich, sweet melting flesh of Royal. Never sufficiently productive to become a commercial fruit, Spark's Mammoth is ideal for the home gardener ... one fruit makes a meal! Early July. 750 hours. On Citation.