Kilayim

Is it permissible to throw vegetable scraps and seeds near a vegetable garden for the purpose of fertilizing the soil?

Can turmeric and ginger be planted in the same planter together? Or do I need to create a physical barrier?

Shalom Uvracha!

Attached are two pictures of flowerpots which were planted with spices (a few weeks ago).  The flowerpots are mounted on a stone fence.  I was told that the spices are at least 15cm apart (does it look it?). I don’t know which spice is which.  The gardener gave the following list (although I’m not sure that all of the list is in these 2 specific flowerpots):

לואיזה
מרווה
גרניום לימוני
בזיליקום
אורגנו
טימין

Can you tell from the pictures which is which? And is there a problem of kilayim (or something else)? Kilayim now or kilayim in the future when the leaves grow and overlap?  And what I should do to resolve the problem, if any?

I have two questions: 1) What are the three categories according to which you can classify different types of plants vis-à-vis kilayim? 2) According to which categories are different types of plants classified today in terms of kilayim?

I initially planted mint in my garden 50 cm away from my tomato plant. Later on, the mint spread towards the tomatoes. Is it necessary to cordon off the mint and uproot some of it?

1. Does the prohibition of kilayim apply to two types of vegetables grown using hydroponics?
2. Assuming it does apply — in hydroponic cultivation, there is usually more than 12 cm between seedlings, although the tops of the leaves sometimes touch. What is the halachic status in such a case?
3. What about cucumbers and similar spreading plants grown in such systems?

If you’re growing vegetables in a hydroponic system, does kilayim apply? Could you grow tomatoes, lettuce, herbs and cucumbers next to each other in the same larger system? Their roots would likely touch at some point.  Above the surface it would look like they are divided.

Are plums and peaches in the same halachic category so it’s not an issue of kilayim? Or is it an issue? I’ve been saving peach pits and someone in my house added a plum pit to the container by accident. 

I have a compost heap. Naturally, seeds of various kinds also end up there together with the waste, unintentionally germinating.
Recently, pumpkin seeds sprouted there, and I decided to use the seedlings.
Is there a problem of kilei zera'im because there may be seeds of other kinds in the pile (which so far haven’t sprouted or at least haven’t grown to a noticeable size)?
Does it make a difference if I grow the pumpkin seedlings inside the heap or if I remove them and plant them in the garden?