Are you able to tell me what is wrong with my Begonia and Hibiscus plants? The recent storm might have done a number on them, but I'm not sure. Thanks !
It does look like mechanical damage, and nothing serious to worry about.
Here are some articles to help you care for them:
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/how-to-care-for-hibiscus-plants.htm
https://www.gardeningknowhow.com/ornamental/flowers/begonia/annual-begonia-care.htm
How big does a begonia tuber need to be for it to grow? I have a b. Boliviensis and I took a cutting which formed a very small corm, once the corm formed the stem broke off, the corm is still hard and not mushy but it isn’t growing any bigger. The corm is about a cm and it’s in some coir/peat substrate sitting on a north-west window sill.
Most of begonia growers suggest a tuber be at least an inch long to provide for stem growth. But you never know! One cm might just be the perfect size to develop a few stems and a few stems are all you need!
Here are a couple of articles to help you with growing your b. Boliviensis:
https://www.gardeningknowhow.com/ornamental/flowers/begonia/growing-begonias-from-corms.htm
I have four beautiful hardy begonias. All of a sudden the leaves on a healthy stem will start curling up (in a matter of a day) and then turn brown and die. This has happened on three of my plans. Any suggestions.
This article should help:
https://www.gardeningknowhow.com/ornamental/flowers/begonia/curling-begonia-leaves.htm
I bought these Begonias about 6 weeks ago and for 5 of those weeks they thrived. I used organic compost, a tiny recommended amount of food pellets and a generous quantity of gravel. I deadheaded them gingerly. Now they've sudden flopped. The weather's been a bit rough but not cold. What have I done wrong and what can I do now?
This can be common when the weather cools off. Another thing to consider is that the soil needs to dry out down to at least 2 inches between waterings. Leaving the soil too wet for too long without a dry period in between can cause root rot.
They can, also, tolerate very heavy pruning. The more you prune them, the bushier they will get!
Here are some articles that will help you with the care of the plant:
https://www.gardeningknowhow.com/ornamental/flowers/begonia/growing-begonias-from-corms.htm
https://www.gardeningknowhow.com/ornamental/flowers/begonia/annual-begonia-care.htm
dear friend gave me cutting from her humongous begonia, before she passed. it was doing well when I moved from NC to WV, continued well, moved to FL; stayed on lanai out of direct sun, thrived, had to trim constantly, giving pieces to friends, and starting new plants! now I have moved back to coastal carolina, it has been in the house in a sunny room, but something is killing it from inside...the stalks are brown and wholy inside, leaves are dying also. is there anything to do to save this plant? its all I have from my very dear friend and it breaks my heart I dont know what to do to save this plant! it was so beautiful and doing so well. did I start to kill it by taking so many cuttings and triming? please hurry, dont know how much longer it will last! I've watered, fertilized, sprayed, removed dead etc. nothing........
Sounds like your plant has gotten a bit of root rot. Here are a couple articles that should help:
https://www.gardeningknowhow.com/plant-problems/disease/treating-root-rot-gardening-tips-for-housplants.htm
https://www.gardeningknowhow.com/ornamental/flowers/begonia/begonias.htm
begonia leaves are dying, something eating inside of plant in the stem - brown and hole
It's hard to tell without seeing the plant, but I'm guessing it's suffering from pythium root and/or stem rot. You may need to sterilize your plant's soil. Here's a helpful article:
https://www.gardeningknowhow.com/ornamental/flowers/begonia/begonia-root-knot-nematodes.htm
Yes, in fact it's preferable that they sprout before planting them in soil. Here's an article for you:
https://www.gardeningknowhow.com/ornamental/flowers/begonia/growing-begonias-from-corms.htm