1.6 Update I have 2 questions...

[Kepaliar]

I'm a newcomer to SDV 1.6, and there are some info that I don't know yet.
(Actually I'm not sure all of them are relevant to 1.6)
First one, I forgot to scythe a patch of grass on Fall 28, and when it turned to Winter 1, how come they're still there???
Second, what the hell are frenzies? Well I guess they're something updated in 1.6 cuz I haven't seen'em when playing 1.5.6. I've encountered three, two in Cindersap(Salmon and Tiger Trout frenzy) and one in town(Tiger Trout frenzy). I'm not saying they're not good since I can make some cash with all the fish, but what are they?
Answers will be appreciated!

 

[stardew_luv]

Ok first question, leftover grass no longer dies in winter, however it won’t spread further. If you don’t want it, clear it. If you want to save a starter patch to start growing on Spring 1 then save it.

Your second question is what a fish frenzy is. The game will state where it is, quickly travel there and there will be a part of the water where one kind of fish are literally jumping out of the water. Cast your line directly where fish are jumping and if you are able (fishing level is high enough for that fish) and have the skill to catch that fish (some are harder than others obviously). then you will catch whatever frenzy fish is happening. Good luck!

 

[Ereo]

Since 1.6, grass doesn’t disappear in winter. You can still harvest it, but at a reduced rate. It will spread out in spring.

Frenzies are like the bubbles, but only for one type of fish. If you fish in a frenzy, you’re very likely to hook this type of fish at a much higher bite rate.