Plants can wilt for a number of different reasons. These range from simply drying out to being attacked by a fungal disease that prevents the roots from absorbing water. A little investigation and insider information on how the plant has been grown should identify the reason.
Many grafted plants – including roses, ornamental trees and fruit trees – produce unwanted growth from the rootstock they are grafted onto. These suckers should be removed or they can spoil the overall growth of the plant.
Iron is a trace element or micronutrient, needed by plants in small, but essential amounts. Some plants, particularly lime-hating, ericaceous plants are more susceptible to shortages of iron in the soil or its unavailability.
Although many plants we grow in our gardens are tough as old boots, frost, cold weather and cold winds can be fatal to some plants. Typical frost- and cold-sensitive plants include most summer bedding plants and annual herbs, such as basil.