Questions about Nabana no Sato

Hello! I'm planning an Osaka trip in December and I'm thinking of spending a day in Nabana no Sato. I have a few questions:
- Is there a direct bus from Osaka to Nabana no Sato that's covered by the JR Pass? (if there's none, we'll use the train.)
- Are there flowers that bloom in the park in around December 28-30 other than those in the Begonia Garden?
- Can the Y1000 voucher that comes with the entrance fee be used to enter the Begonia Garden?
- I saw here https://www.nagashima-onsen.co.jp/nabana/illumination/fee/index.html that I can buy tickets in convenience stores, can I buy tickets in advance? Also, did I read it right that you can enter the Begonia Garden for free if you buy tickets from the convenience store?

Thank you very much!

no, the railpass doesnt cover the busses needed to go there.

my personal hint:
since going there with public train and afterwards local bus, this kinda takes very long. i therefore suggest you following:
there is a shuttle that goes from Meitetsu Bus Center, which is very near to Nagoya Station (to which you can travel with railpass), that will take you to Nagashima Onsen and you can also get off at Nabana no Sato. It is the fastest way to get there from Nagoya station.

(by the way, i highly recommend to check Nagashima Onsen also afterwards (you can go after your stroll in the park), it is one of the most nice artifical onsen landscapes in all japan.)

ah, just checked there webpage, there seem to be a JR bus also from osaka:
https://www.nishinihonjrbus.co.jp/search/result?route_id=17837
so you may be able to use the bus.
(sorry, didnt know about it)

https://www.nishinihonjrbus.co.jp/search/result?route_id=17837
that's covered by the JR Pass?

Very likely not???

Which rail pass cover Nagoya station to nagashima onsen by bus.

Which rail pass cover Nagoya station to nagashima onsen by bus.

I am not aware of one. I don't think it exists.

from Nagoya there is none. If you want to save as much money as possible you can go with the trains until station - but from there you will still need to take a bus. however i dont think it is worth the trouble, since the shuttle from Meitetsu Bus Center is quite cheap (950 yen).

But it seems from Osaka, there is some JR Bus... (See link in above comment). However i am not sure if you can use the JR-pass there.

here is info about the bus:
https://www.nagashima-onsen.co.jp/resort/access/nagoya_bus.html
prices: http://www.sanco.co.jp/highway/naganagoya/tariff.php

Do you think shoryudo unlimited bus pass 3 Day=8500 yen
5 Day=14000 yen cover Nagoya to nagashima onsen by meitetsu bus

https://www.mwt.co.jp/shoryudo/instruction_en.pdf

Yes,This shoryudo unlimited highway Bus pass cover.

Thanks Josef for your kind information.