We planted Carnations, and they are doing well with the exception of one row that is doing well but are not flowering. It does get less sun, but the plant is thick and looking good. What should we do?
Generally, carnations have little problems, especially with flowering. However, there are some things you can do--first, if flowering becomes an issue, you could attempt fertilizer. The only problem here though is the fact that you said the plants don't receive as much sun as others. Carnations need at least 6 hours of sun in order to bloom. If these particular plants are not receiving enough light, your only recourse is to transplant them elsewhere OR simply let them be and live with little to no blooms.
I am starting to get interested in plant breeding but I can't find this answer anywhere. Can I, for example, cross a buddleja with a carnation? Or do you have to stick with the same species of plant (e. g. crossing a ceanothus concha and a ceanothus blue mound)?
There are several interspecific hybrids available on the market, geraniums, peonies and others. There are many more being tested in labs around the world. This is cutting edge in the plant industry. This link will take you to several articles on interspecific hybrids: http://scholar.google.com/scholar?q=intergeneric+hybridization+in+plants+examples&hl=en&as_sdt=0&as_vis=1&oi=scholart&sa=X&ei=rGT8UbC6FvSp4APs6oDwCg&sqi=2&ved=0CCgQgQMwAA
I cannot seem to get the seedlings to progress past first set of leaves. I need help, please. I have searched for answers, bought books, tried 4x this year, and bought seeds from 2 different sellers, still having this issue. Also have tried starting mix as well as potting soil with fertilizer, also tried just misting them, adjusting time of light, covering with plastic bag for a time. Also different temperatures, and different rooms... What am I doing wrong?
Without actually seeing what you're doing, it's pretty hard to answer what you're doing wrong. We can only give you suggestions, and it's up to you to think carefully about your processes, and experiment with different approaches until you find what works. The first thing that comes to mind is that you're having problems with damping off fungus. This article has a few tips on combating this common problem: https://www.gardeningknowhow.com/garden-how-to/seeds/what-is-damping-off.htm
I can say you definitely don't want to be using potting soil to start seeds, but beyond that there are a number of mixes you can use. Also, consider using a heat source under the growing trays; many people have found that's a big key to successful seed starting. Here are a couple of articles that have some guidance for you: https://www.gardeningknowhow.com/ornamental/flowers/dianthus/growing-carnations.htm
I have a sub zero carnation plant that was doing fine but it seems that it is starting to die. Is there any way to get it healthy again?
Can you grow carnations in zone 9?
Dianthus are hardy in zones 3 to zones 8 or 9.
Perennial Carnations can be grown in zones 5 through 9, although many varieties are only happy in up to zone 8.
Do your research and look for varieties that list zone 9 for success with this plant.
Should the plants be stopped to produce more flower stems?
You can dead head the flowers to promote more flowering.
This link will refresh you on the care requirements.
WHAT IS THIS FLOWER CALLED green flowerhead hangs down but turns upright when in flower
This is a Giant Double Poppy.