I brought my geranimums in for the winter. They are in a pot near a sunny place and I am careful not to overwater. The foliage is healthy and growing and green, but no flowers. When I bring them back out in the spring/summer, will they bloom flowers again?
Yes, with adequate care, they should rebloom for you. These articles should help: https://www.gardeningknowhow.com/ornamental/flowers/geranium/geranium-care.htm
They may just be adjusting to the move inside as humidity and lighting are both lower than outside. Grow on as houseplants. Many people de-bud them in the winter and then they really take off in the spring when set out. I always just enjoy the blooms. Geraniums are tough plants. Many people hang them upside-down by their bare roots and place them in a dimly lighted cellar or fruit cellar and plant them out in the garden in spring. Start new plants every two or three years as they seem to lose vigor when older.
After blooming beautifully all summer and full of flowers, I brought two pots of geraniums inside for the winter. They almost doubled in size over the winter but no flowers. Just this month one plant got one flower. Why aren't they flowering? Thanks.
First make sure they are getting plenty of light. Also, it sounds like there may be too much nitrogen. Give the plants some bone meal to balance the phosphorous back out and that should help bring the blooms back.
My large geranium plant I have in the house has yellow edges on its leaves. I was told the soil might need nitrogen. Can I use blood meal?
There are many reasons for a plant to develop leaf yellowing, nitrogen deficiency being only one. It could also be a watering issue, perhaps too little. I would first check the possibilities in the following article before applying any nitrogen fertilizer. That said, blood meal should be used with caution, as it contains a high amount of nitrogen and you risk giving your plant too much. I would recommend a slow release fertilizer, like Osmocote, for your houseplant. These articles should help: https://www.gardeningknowhow.com/ornamental/flowers/geranium/geranium-yellow-leaves.htm, https://www.gardeningknowhow.com/plant-problems/environmental/plant-leaves-turn-yellow.htm, https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/blood-meal-fertilizer.htm
I live in Spain and currently have a riot of blooms on Pelargoniums and Geraniums, both plants growing taller and taller to outshine one another. If I were to cut them back now, will they bloom again this year?
Cutting them back now may not result in new blooms this season, but if the plants are getting leggy, you may need to prune or pinch them back. This will not hurt the plants. It could actually surprise you with additional blooms since it's still early in the season. For additional information on pruning or pinching of geraniums, these articles will help: https://www.gardeningknowhow.com/ornamental/flowers/geranium/pruning-geraniums.htm, https://www.gardeningknowhow.com/ornamental/flowers/geranium/leggy-geranium.htm
My geranium seedlings have began to flower. They are only 5-7 cm tall and I have never seen them flower so early. Is this a good thing? What should I do?
I would pinch the flowers off. They will sap energy away from the plant that it needs to grow. I would also check to make sure that there is nothing stressing the plants. Plants tend to flower too early when they are stressed.
I recently planted bedding geraniums but have now noticed they have yellow spots in the leaves and the leaves are dried up. Can I treat this with a fungicide? Begonias in the same basket have the same condition.
Yes, this is an indication of a fungal issue, especially if your other plant is showing the same signs. Treating the plants with fungicide and allowing it to dry some should help.
I have my plants on the window sill with light but not direct sun.
The first thing to check is soil moisture. Potted plants often show yellow leaves when the soil is too dry -- water is not getting to the leaves -- or too wet -- roots are damaged so they can't transport water to the leaves. When you water, pour on enough that you get a runoff from the pot. You don't need to pour it off if it's 1/2" or less. Before you water again, test the soil all the way to the bottom of the pot for moisture. You can use a pencil, dowel, or kebob skewer as if testing a cake; or use a moisture meter. The soil should be very slightly damp.
After you decide if soil moisture is the problem, think about light, soil, and mineral levels. This article has more information: https://www.gardeningknowhow.com/ornamental/flowers/geranium/geranium-yellow-leaves.htm