tip die-off

Has anyone noticed that Hoya tips die off much more frequently on hanging pots than those growing on trellises? Except for the pendant types, which naturally grow down and hang, like bella and wayettii, all of my hanging baskets are full of dead tips. Is this maybe due to mechanical damage when they get carried around, or are twiners less vigorous when they are forced to grow down?

Yes, I notice that the hanging plants have more dead tips than those grown on hoops/trellises. I suppose, given that they are climbers, lacking something to attach to could make a difference. I was just chalking it up to the fact that the hanging pots are in the windows of the rooms I inhabit the most, so I notice the dead stuff on those more than I do the others - but maybe there is something to this.
Ann

I only have a few hoyas that hang, and I notice dying tips on most of my newer vines. So, I guess my answer is a qualifed no - because I don't have enough hanging ones to compare.
Christine

That's happened to a few of mine, too, and I was thinking that it was a humidity issue.

What I have noticed is that tips will dry up whenever you repot or retie a bunch of vines the way you want them. It doesn't seem to matter wheather it is a trellis or hanging pot. It is like the plant is having to put down new roots (in the case of repoting) so it sacrafices all the new growth, or else it is protesting (in the case of retieing the vines in different ways). Like saying, "Hey....I didn't want to go that way...so I'll just make that vine die & grow another one down the stem a bit so I can go the way I want to." Ha Ha.
Marcy

I always thought it was because the pot, hanging freely, twirled and the tender baby vine got bruised.... hmmmmm.

That makes sense to me Carol and Marcy; the same thing probably happens in their natural setting, getting blown around before they can take hold of something to support.
Christine

I like the plant protest idea. With climbing roses, you often have to bend tall canes over and tie them with the growth point lower than the arched portion of the cane. When you do it, gravity somehow affects the growth point to stop producing growth hormones, and the arched portion breaks into bud at every node. Maybe danglers produce different growth hormones that aren't affected by gravity in the same way, and so generate more at the lowest portion of the stem rather than the highest. That would also explain why when I tie down long Hoya stems to let them start climbing again, their growth generally slows down dramatically.
I have noticed that without exception, all of the twiners I have on trellises grow more rapidly than those in hanging pots.
Mark