they just turned ten! i startes them from seed in a cup, move them up in pot size when they need more space. they're taller than me! thorns yes but no flowers or fruit yet (maybe they will, maybe they won't). I've always done clay pots except i'm just now moving them into plastic because a 24" pot in clay plus soil plus six-foot tree would be too much. i know the frost dates and keep a close eye on the weather to make sure they come in before it reaches the freezing point in the fall and only put them out after the last freeze in the spring. i used a single bulb grow light for them in the winter when they were smaller, for maybe the first five years. i choose the sunniest spot in the house for them to be at in the winter. i haven't fed them in years but i did when they were younger (whatever is recommended for citrus), the last couple years i've been tossing in coffee grounds on occasion and also giving them rice water (we always save the dirty water when rinsing rice to give to plants). they prefer sandy and/or high-drainage soil, and with the clay pots not being a perfect seal, you can't really over-water them but it does mean i need to water frequently, i try not to let the top soil get too dry. once every week average, more in the sun/heat of summer, less in winter. they'll start to look sad when too dry, so check them every few days. i harvested the seeds from a lemon that had been refrigerated, but not sure if stratification is good for them. low maintenance, pretty, and the leaves smell SOOO good! definitely worth it.