If things get really bad for your geraniums and you find that they are dying, take heart: it is possible to rescue dying geraniums. Geraniums, like all other plants, are prone to a number of ailments or conditions that can lead to it being in poor condition; if things go really bad, your geraniums may actually start dying. But, by following these simple tips, you may be able to save your plants.
First and foremost, you should use preventative measures. That means that when you are purchasing your geranium plants at a nursery, you should use good judgment and buy only healthy-looking plants. If you see any geraniums that are extra long and have brown roots or stems, you should avoid them. These are not healthy plants, and this type of condition typically shows that the geraniums are diseased, possibly even already dying. Instead, make sure to opt for plants that are green and thriving, and that are obviously in good health.
Unfortunately, some plant diseases can be so advanced that it makes it impossible to rescue your geraniums. If your plant is plagued by bacterial leaf spot, which is a condition that can come about due to overcrowding, it may be so badly affected that you will have to destroy the plant. However, if you see the ailment in its earlier stage, which includes pinhead-small brown spots affecting the leaves, you can simply cut away the diseased parts. This will help to safe your geraniums, though again, you will have to replant to avoid overcrowding, which can lead to a repeat of the disease. Mulch is also helpful in helping to save the plant after such an incident.
Fungal diseases such as blossom blight and botrysis leaf spot can also adversely affect geraniums. This is found it moist, cool conditions, and you can determine it by leaves that turn brown and develop grayish-brown spores. You can salvage your plant by removing the diseased leaves and spraying a good fungicide. Inquire about this at your local nursery or home improvement store.