My soursop is getting too tall and I want to cut it back some. Should I do it now
during the winter or wait for warmer weather?

Photos would help.

Great video Raul.

I bought seeds from forum member Stuartdaly88 and had pretty good success following his instructions:

"Soak with water for 24hours before planting. I haven't germinated the other two yet the seeds have long dormancy. I have some M.discolor at the moment in bag with cotton wool that have swollen a lot I think it's been a little over a month but I expect root tip any day now!
The marula I have germinated many times. It is the most erratic germinated ever. The thick shell means they take a few months to pop out the soil but I have had some take up to two years and germinated randomly after I had long ago reused the soil
 They have very distinctive fleshy leaves so I could recognized them easily. I have heard of some techniques for faster germination but I can't speak from experience as I just planted them in nicely draining but moisture retentive soil. I have heard a couple minutes in just boiled hot water can speed it up also scarification may help. I can't find the page but I read a post on garden Web the lady said there is a plug you can find in the seed and remove it with a knife my seed anatomy is not too good I couldn't really see a plug though.
They will germinate without any of this just at very random times obviously an adaptation so not all seeds sprouted in the same season in case of drought killing them.
GA3 500ppm 24hours soak on these three species has not had any difference from normal soak but higher Ga3 may help I'm experimenting so will tell you if I find a trick:)"

Check out Green Sea Farms:
http://greenseapomegranates.com/

I'm trying. I have 2 small ones...1 from Costa Rica and the other from Borneo (both seedlings).
They have survived 2 Winters with no damage albeit we haven't had any real low temps.

They are definitely slow growers. I planted the seeds
in December, 2017. Finally made them happy and turning green this year.

Found an earlier post regarding the fruit:

http://tropicalfruitforum.com/index.php?topic=16977.0

Not meant to be a judgement of the ebay seller.

Is that a nangka mini?

Premieres later tonight!  Don't watch this if you want to mix your own soil!

https://youtu.be/tzU9-ZvsKXw

Does it include chicken parts?   

Nice

Here's one, but it is much more expensive than the one I bought, that
attaches to a 16 foot aluminum extension pole I bought at Home depot.

https://frostproof.com/clip-n-pick-telescoping-fruit-picker-complete/?utm_source=TPA%20On%20Google%20Shopping&utm_campaign=Smart%20Shopping&utm_medium=cpc&product_partition_id=335994500521&product_id=704&device=c&loc_physical_ms=9012157&gclid=Cj0KCQjwvIT5BRCqARIsAAwwD-RPeVETHDU6uO99pXDKrXdAGk7ktA6mQowAXLXbOgXBz59jSaMTpAkaAk4wEALw_wcB