A good crop rotation plan that keeps flower bulbs from being planted no more often than once every four years in the same place will limit the need to apply soil disinfection agents.

Sometimes, however, a flower bulb planting site is so important for the image of a garden, park or city, that the same location is used every year. In this case, it will be highly probable that soil diseases such as Rhizoctonia tuliparum will become a problem. Many flower bulbs such as tulips, hyacinths and lilies are susceptible to this disease, but other perennial plants can be harmed as well.

If it is highly probable that Rhizoctonia will be found in the soil, it is possible to work tolchlosfos-methyl (0.5 litre/200 litres of water or 0.11 gallon/44 gallon of water) through the soil with a rotary cultivator previous to planting. .

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