I live on Merritt Island, FL and have a shallow well. The well water is a little bit salty. Will the plumbago bushes tolerate salty water?
Excessive salts can be harmful to many plants, shrubs and trees.
Here is a link with information on plants that are tolerant to salt conditions.
https://www.gardeningknowhow.com/special/seaside/gardening-salt-water-soil.htm
You can water your plants with rain water that is collected in rain barrels.
https://www.gardeningknowhow.com/garden-how-to/watering/collecting-rainwater.htm
Does anyone know if Plumbago flowers can be made more blue by adding aluminum to the soil or potassium sulfate in the fertilizer as one would for hydrangeas? I recently planted two Cape Plumbago in containers and noticed that the flowers on one are much darker blue than the other. (I am a garden novice in zone 9 and Plumbago seems to thrive here). Any help with boosting the blue color would be appreciated. Thanks you, Maxx
Plumbago is not known to change its color in response to pH or to aluminum availability. In fact, aluminum can be harmful to plants that are not adapted to high-aluminum soil.
The difference between the two plants you have may be based on small genetic differences, but environmental factors like too-bright sunlight on the pale flowers could also play a role. Making sure the plants are well nourished with compost or fertilizer and a source of micronutrients won't hurt:
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/rock-phosphate-fertilizer.htm
I am not getting any flowers on my plumbago.
Make sure your plant is getting full sun, they are less likely to flower in partial sun.
Do not over fertilize, excess nitrogen can inhibit flowering.
This article will refresh you on the care requirements.
https://www.gardeningknowhow.com/ornamental/shrubs/plumbago/growing-plumbago-plants.htm
I have a large planting of plumbago that froze in December. Can I cut it back now or do I need to wait until February or March? Same with my Firebushes and Philodenron selloums- they were huge.
With freeze-damaged plants, it is best to hold off on pruning them until spring (after the last chance of frost). This will prevent any future cold weather from harming the plant further, and it will give the plant a chance to start growing again in spring. Once the plants start producing new leaves and growing again, you'll be able to distinguish which parts of the plants are alive and dead, and prune accordingly. Please see these articles also:
https://www.gardeningknowhow.com/plant-problems/environmental/tips-for-saving-cold-damaged-plants.htm
https://www.gardeningknowhow.com/plant-problems/environmental/how-to-treat-frozen-plants.htm
7 Plants(5 gallon each) Planted them about 2 weeks ago & water 2x every day. (It's been Hot - Zone 10A) They all have flowers but the leaves are all small & wilted. I used Miracle Grow soil, Home Depot Compost, Fertilizer & the native soil which is quite sandy. 4 of these new plants are near my old Plumbago Hedge that I recently cut all the way back. These old ones are growing beautifully. 3 of the new ones are in another area. I've noticed that 2 of the 4 that do not get as much sun are doing a slight bit better but still very wilted.
Watering is the likely issue for your plants stress. Daily water for the first 2 weeks. Pull back the mulch to check the moisture level.
Here is a link to refresh you on the care requirements.
https://www.gardeningknowhow.com/ornamental/shrubs/plumbago/growing-plumbago-plants.htm
I have plumage planted and is doing very well what other plants like the same conditions?
Here are some links with some recommendations.
https://www.gardeningknowhow.com/ornamental/shrubs/plumbago/growing-plumbago-plants.htm
https://www.gardeningknowhow.com/edible/fruits/currants/growing-currants.htm
https://www.gardeningknowhow.com/ornamental/shrubs/eugenia/growing-eugenia-plants.htm
https://www.gardeningknowhow.com/ornamental/shrubs/sweet-pea-shrubs/growing-sweet-pea-shrubs.htm
https://www.gardeningknowhow.com/ornamental/shrubs/yesterday-today-tomorrow/yesterday-today-tomorrow-plant.htm
https://www.gardeningknowhow.com/ornamental/shrubs/ixora/growing-ixora-shrubs.htm
I encourage you to visit your local garden centers and greenhouse and window shop!
I also like to drive around the neighborhood and see what is successful in the nearby landscapes.
Do you know where I can purchase a Plumbago Tree. I've tried all of the Nurseries in my area of Southern Maryland?
Do a Google search for trees. There are many sources that can ship direct to you.