Zoreiah - planting applies to even the smallest amount. If you plant a seed, plant a tree, grafting, taking a branch connected to its source and stuck it into the ground to make a new tree called havracha, or pruning in order to help the plant grow, youíre chayav. A rock or perforated pot and they have grass, if you take them from a top of a chair and place them on the ground, you are chayav because of zoreiah. If you did the other way around, youíre chayav because of tolaish uprooting. 21 [you should be careful even of the pot has no hole Orach Cfaim 336] You are even forbidden to move it, because itís muktzah. Even for the object the grass is growing on or the place where it is, you are forbidden to move the muktzah object, similar to an egg that is laid on Yom Tov, upon which is forbidden to lean a pot. The Toldos subcategories of zoreiah is any action that doesnít touch the thing that you are intent on but is similar to zoreiah in tachlis that has the intention to help a plant grow, even though the action isnít similar to zoreiah. A case would be to sort the bad plants from the good, so that the good plants grow better. [look at Kessef Moshna perek 8 of hilchos Shabbos] Another case would be watering plants, both of these would be chayav because of zoreiah. [Moed Kattan 2:] To smoke trees, to kill the bugs from inside of it, or ones that hang on the outside, to smear trees, or to do any action that would help treeís to grow is zoreiah. [Yerushalmi in our perek]One who cuts aspasta [meaning growths of grains which is called shachas which is cut three times in a month to fed to animals since he does this the grains grow better] or cuts beets [meaning he cuts beets to eat and through this it grows better] or prunes [meaning cuts branches of the tree] and has intent for use of the branches, are all chayav because of kotzer and zoreiah. [ Shabbos 73: I think that even though he did have intent for the purpose of seeding meaning that it should grow still it is a psik reisha and he wants it as it surely will grow through this] [like Shabbos 103.22 look at Magid Mishna perek 1 halacha 6 of Shabbos]If you soak plants in water [ a half day the time that it is] enough so that they grow, itís as if you watered plants, because through the soaking the detached plant will grow, and this is a toldah of zoreiah.
[I think23 this is the intent of the Rambam perek 8 halacha 2] However if is permitted to soak non attached plants so that they donít wilt. [ siman 321 sif 2]Also, it is permitted to put water onto seeds for an animal to eat, because before the seeds can grow, they will be eaten by the animal. Even if you put the seeds onto the water and it grows, since you didnít intend it to happen and now it is a pisik reisha but with no benefit, and according to the Aruch itís permitted in the first place. According to the Magen Avram [siman 336 sif 12] itís only permitted if soaked for a small amount of time. This is also understood from the Hagos Mimone. [ perek 8 of Shabbos] It is forbidden to scatter seeds on the ground for chickens to eat in a place where it is possible for rain to fall24. However, if you scatter enough for just a day or two you can, since itís normal to put it in for just this small amount of time, it doesnít resemble zoreiah, but if you leave it in for longer it does resemble zoreiah. [I think that this pshat in siman 336 sif 4] Since it is forbidden to put seeds in a place where it will grow, or to pour water that isnít needed onto grass, therefore people should be careful not to eat fruits or drink drinks in the garden, since it is hard not to drop a seed from the fruit or pour the remainder of the cup. [there sif 3]Even drinks that donít have any water in them as wine and the like, you should be careful not to pour out the drink on the grass. [Magen Avraham there sif kattan 7] But to urinate there is permitted. [There, however according the Academicians who say that urination is very good for fertilizing the ground and if so fertilizing it is a tolda of choreish like the Yerushalmi in our perek and you have to say nature has changed][Like the Magen Avraham siman 173,170, 331 sif 9 and Even Haezer siman 156 sif 4 and Yorah Deah 316 sif 3]Picked grapes that were put into water on erev Shabbos you are allowed to take them and return them since the flowers donít open upon contact with water, as it says [Succah 42] on Shabbos we may return, on Yom Tov we may add and on Chol HaMoed we may switch the water. However on Shabbos it is forbidden to put them in water the first time either because itís a bother or because it is like fixing a utensil. [ look at Rashi there in Succah and not like it appears from Shulchan Aruch siman 336 sif 11 that even lechatchilah it is permissible. Baruch Yitzchak the son of the Tifferes Yisrael says in Aishel siman 336 and Mishbetzes siman 654 it appears that even lechatchilah it is permissible however my words are from the Nassi of Yisrael who donít need to be strengthened. I also found to all the explainers that explained it this way, and look at the Kappas Temarim there] Some people hold that it is forbidden to water from a pit through a wheel, because it looks like your drawing water for a garden. Today, however, the custom is to be lenient and allow water from our water wheel, since it doesnít fill much water in one go, and it doesnít look like you are watering a a field, [ siman 338]