Table of Contents
Gladiolus are stunning flowering plants that add vibrant color to gardens and landscapes. To keep them healthy and blooming beautifully, regular maintenance is essential. Creating a monthly checklist helps gardeners stay organized and ensures their gladiolus thrive year after year.
January
During January, focus on planning for the upcoming planting season. Review your garden layout and prepare your soil by adding compost or organic matter. If you haven’t stored your gladiolus corms from the previous year, inspect them for any signs of rot or disease and store them in a cool, dry place.
February
February is a good time to order new gladiolus corms and start preparing your garden beds. Clear debris and weeds, and loosen the soil to improve drainage. Consider starting some corms indoors if you want an early bloom, especially in colder climates.
March
In March, it’s time to plant gladiolus corms outdoors if the danger of frost has passed. Space the corms about 4 to 6 inches apart and 4 inches deep. Water thoroughly after planting and mulch to retain moisture and regulate soil temperature.
April
Continue to water regularly, especially during dry spells. Fertilize with a balanced, water-soluble fertilizer every few weeks to promote healthy growth. Remove weeds promptly to reduce competition for nutrients.
May
May is the peak blooming period for gladiolus. Support tall flower spikes with stakes or cages to prevent them from falling over. Deadhead spent flowers to encourage more blooms and maintain a tidy appearance.
June
Continue watering and fertilizing. Watch for pests such as aphids or thrips, and treat infestations promptly. Remove any yellowing or damaged leaves to improve airflow and plant health.
July
As the flowering season winds down, cut back flower spikes after they fade. Keep watering to help the corms store energy for next year. Remove any remaining dead foliage to prevent disease.
August
In August, reduce watering as the plants begin to go dormant. If you haven’t harvested your corms yet, wait until the foliage has completely yellowed and died back. Carefully dig up the corms, brush off excess soil, and inspect for any signs of disease.
September
Dry the harvested corms in a well-ventilated area for a few days. Store them in a cool, dry, and dark place, such as a paper bag or mesh container. Label the corms for future planting.
October
October is ideal for planting new corms indoors or outdoors, depending on your climate. Prepare your soil and follow planting guidelines. Continue to monitor moisture levels and provide support for tall stems.
November
In November, focus on garden cleanup. Remove any remaining plant debris to reduce disease risk. Mulch around the planting beds to protect corms during winter and conserve soil moisture.
December
December is a quiet month for gladiolus maintenance. Use this time to review your gardening practices and plan for next year. Ensure stored corms are kept in a suitable environment, and order new varieties to diversify your garden.