|>>|| No. 14586
Neither lemons nor blueberries grow very well in this country; blueberries fairly poorly and lemons only under glass - heated, in colder winters*. That and they both prefer ericaceous soil which is less common than not here. Too much lime in our soil. Blueberries are also quite small plants so never really produce the same fruit mass as a full tree can. Apples, on the other hand, do really well here. So that's going to count for at least some of the cost.
*The only citrus fruit hardy enough to reliably survive in this country is Poncirus Trifoliata, the Japanese Bitter Orange which is inedibly bitter. People still grow it here as it's quite fast to grow, has massive nasty thorns and can (allegedly) become dense enough to stop a car; so it's good for hedges if you really dislike people.