Fortunately I can always get lemons as well as wonderful limes from my neighbours and friends. I have a real aversion to spending money on these items as well as mangoes!!! I flatly refuse to buy a mango,as they litter the ground here for months!!!
We have a Lemonade tree (sweet lemons) which is too small to get fruit on it yet, and a tree which I think is a graft that grows both lemons and limes, which produces tonnes of fruit at the right time of year.
I generally have to buy them, although when they're in season people with lemon trees will sometimes leave bags of lemons in their front yards that passers-by can help themselves to. Unfortunately, backyard lemon trees are one casualty of our rapidly-shrinking backyards. When we first moved to Perth about 23 years ago almost everyone had a large back yard with a few fruit trees in it. Now this is rare.
Yes, I'm the same on my junk mail rounds in different suburbs. The lemon trees were planted by (largely) Italian migrants in some areas and as you say, as these people die, move out, the house and trees are all bulldozed for ugly multi storey apartments now with no garden in sight.
I often see boxes/buckets by front gates with various citrus fruits on offer, or for a small amount, like 50 c/$1 each, etc.
Sometimes I have to buy lemons. At other times I have them given to me. I have also got some through a produce swap group I go to. I have planted a lemon tree in my back yard so I hope to be self sufficient in that regard in the future.
Since I moved to a smaller place I don't have the right spot to grow a lemon tree.
I miss having one in my backyard, and picking them whenever I needed them.
I have friends who give me some now and again, but I hate having to buy them
I only buy them if I think the price is ok for a bag of 6. These I buy from Aldi. I mostly use them for my evening G&T! A friend has a small tree, & if she has too many lemons, she squeezes them, & freezers the juice in ice block trays.
Part 2: No, we've never had an lemon tree. My parents did, when i was growing up, When my friend & I were walking recently, we saw a huge lemon tree in some someone yard, covered in lemons. My friend wrote them a note, with a phone No, & they rang & said she could have some. She took the house owner 2 little bags of frozen fish fillets, her husband had caught, in exchange for the lemons. When I see her in the next day of 2 she'll give m some of the lemons. There is another house with a big lemon tree on our walk, & we sort of know the women who lives there, so we may ask her for some of her lemons, when need them again! There's a medium size lemon tree in my daughter's partner's back yard in Melbourne, which produces big lemons all year round.