Terumot & Ma’aserot

I have a tangerine tree in my backyard for seven years now. This year the tree yielded a lot of fruit, B”H. Do I have to take ma’aser each time I pick a certain amount of tangerines?

Fruit brought into the house through the window is not subject to the obligation of separating terumah and ma’aser. I live in a private house, though, and the fruit first goes into my yard and only after that is brought through the window. Is the fruit still exempt from terumah and ma’aser in this case, too?

I grow several vegetables in my garden such as string beans, peas, and potatoes. Sometimes I take all or some of the seeds to plant the next round of crops in my garden.

1) Am I supposed to take ma’aser from the seeds before planting, or does ma’aser only apply to edible produce?

2) If there is an obligation of taking ma’aser at this point, do I need to take ma’aser from seeds I buy at a nursery?

Do I need to take ma’aserot from the mint growing in my garden that I use to make tea?

Which poskim are lenient about eating herbs grown in planters without first taking terumot and ma’aserot?

There is a guava tree in my apartment building’s shared courtyard (with 15 families). Every week I pick two to four fruits and take them home. Am I supposed to take terumot and ma’aserot from the guava with a blessing? If the tree was in a public playground, would its fruit also be subject to terumot and ma’aserot?

I grow herbs (thyme, rosemary, basil, etc.) and use them as seasoning. We actually eat them; they don’t only provide a flavor. How am I supposed to go about taking terumot and ma’aserot from them? Each time I pick a small bunch of leaves, so I would set aside less than a leaf? For example: how much am I supposed to take from the 2-3 basil leaves that I add to the spaghetti sauce?

Is it true that there is an arrangement where I pay money and terumot and ma’aserot are taken on my behalf?

Will the following apply in my case?  I read that “while there is a halachic solution to separate in advance once every week, it should only be employed if you are concerned that someone (family member, perhaps) will harvest without separating”. (I assume that in advance means like a spiritual separation; that can be done before one has any produce picked/in one’s hand), In my circumstance, until I have I bigger yield, should / could I separate in advance once every week? If this is applicable in this case, please advise how this is done?

Hello, I teach at a girls’ high school. As part of our agriculture classes, we have two greenhouses and also a few fruit trees. I signed up the school with Beit Ha'otzar, but I’m not sure whether a regular membership fee is sufficient or if I should have arranged some kind of expanded membership.