When you have attracted five Medium-sized Billy Goats to the grass, the Buttercup will change to Big.  Make sure that the toadstool with the Nightshade is to the left of any other toadstools with bubbles on.  Leave out an empty Rusty Bucket, and the next time the fairy visits she will harvest the Nightshade into it.  You may want to replant the Knapweed toadstool at this point, but this would mean that you'd need to dump any remaining berries and send the feeding table back to storage because there isn't enough room in the garden otherwise.  Otherwise send the pot back to storage and wait until the Buttercup is harvested before replanting the deterrent toadstools.

When the Big Billy Goat is spotted, it will harvest the Buttercup.

When you have attracted five Small Goats to the grass, the Buttercup will change to Medium.  Make sure that the toadstool with the Knapweed is to the left of any other toadstools with bubbles on.  Leave out an empty Rusty Bucket, and the next time the fairy visits she will harvest the Knapweed into it.  Harvest the toadstool, send the pot back to storage so that you have room for the Nightshade when you need it.  Dust the Knapweed to fully grown.

Diamond dust the Buttercup to fully grown (you need both the grass AND a fully grown Buttercup to attract the Goats and the Troll).

Make sure your toadstool with the Grass is now to the left of any other toadstools with bubbles on.  Put out an empty high table for the grass to be harvested onto.  When the fairy visits again, she will harvest the grass onto the table.  Harvest the toadstool and replant it for the next round.

Make sure your toadstool with the Butter on it is to the left.  Put out berries for the fairy, leave out an empty Tea Cup.  When the fairy visits, she will harvest the Butter and plant the Buttercup in the Tea Cup.  Do not dust the Buttercup to fully grown yet.  Harvest the toadstool and replant it ready for the next round.

dust it in stages so it will not be RFH all at the same time..

plant 4 yes all..  it need to be RFH

we will be using 28 seeds? means same as the supermushy too and the food… so okay.. we need FT seeds so we will be really careful.

The buttercup starts as small every time, so you have to go through the small and medium goats again.  But it's every fifth of each spotted in your garden which increases the size of the buttercup, not every fifth spotted for each buttercup - so if you'd spotted (say) 9 small goats first time around, you'd only need to attract one more for it to increase the size of the buttercup.

And yes, we have to do this cycle over and over.  Each buttercup only brings one big goat so that's at least seven rounds - but if you don't get your big goat on one round, it is going to take more rounds (and so more FT seeds).  28 would be the very least we'll need, and I expect it will take most of us more than that even if we use Superfood and a Supershroom.   I used both, and it still took two rounds to get my first big goat spotted.

we need 1550 pinkies for snow white!