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You can get these from Faruq's stall which is located in Al-kharid market next to Ali Morrisane's stall. They can be purchased for 65gp each.
farming is a members only skill sorry. Actually you can plant a marker plant. Go to Al Kharid. Speak to Faruq, who is near the beginning of the trail leading into Al Kharid. Buy Marker Seeds, and use them on the ground. Hope that helps :)
no
Grand Exchange
you actually dont get seeds you buy a non tradeable plant but i dont know were
This was likely an older bug, which has been fixed now.
you can find jewelery, jewels, and seeds.
Oxygen is being taken up by the germinating seeds in the respirometer. As the seeds undergo cellular respiration, they consume oxygen and release carbon dioxide, causing the volume of gas in the respirometer to decrease and the marker to move.
No monsters drop Palm Tree Seeds, they can be obtained from the Garden minigame, or Rarely Obtained from Bird's nests.
these are drop by various creatures or can be grown by snapdragon seeds(requires 62 farming)
Runescape garden patches, or common tree patches. But you can also plant marker plants everywhere.
You can buy some kinds of seeds from a seed stall in Draynor Village; you can steal seeds from a master gardener (there is one in Draynor Village); some advanced seeds (tree seeds) are only obtained as special drops, for example from bird nests; or you can buy seeds (stolen or found by other players) at the Grand Exchange.