National Days & Observances for Plant Lovers 

There is a national day for almost everything, including houseplants, gardening, flowers, trees, and even weeds! Throughout the year, dozens of national and international observances celebrate plants and the people who love growing them. Some encourage us to plant seeds, care for indoor greenery, or learn about gardening, while others highlight the importance of healthy soil, pollinators, and biodiversity.

This calendar brings together plant-related national days, international awareness days, and gardening celebrations from January through December. It includes well-established observances alongside lesser-known and informal holidays that offer inspiration for plant lovers.

January: Houseplants and Seeds

January is a good time to give indoor plants some attention, plan the coming growing season, and organize seed collections. National Houseplant Appreciation Day is particularly relevant during the winter months, when outdoor gardening is limited in much of the United States.

• January 4: Free Flower Basket Day
• January 5: National Hydrangea Day
• January 6: Apple Tree Day
• January 10: National Houseplant Appreciation Day
• January 28: Daisy Day
• January 29: National Carnation Day
• Last Saturday in January: National Seed Swap Day

Plant lover’s idea: Inspect your houseplants for pests, clean dusty leaves, and check which plants may need repotting when active growth resumes. National Seed Swap Day is also an opportunity to exchange seeds and discover new varieties.

February: Flowers and Early Garden Planning

February brings several flower-related observances, along with World Wetlands Day, which highlights ecosystems that support many important plant species. Gardeners can use this month to review seed catalogs, prepare planting schedules, and plan spring projects.

• February 2: World Wetlands Day
• February 5: National Primrose Day
• February 7: Rose Day
• February 28: National Floral Design Day

Plant lover’s idea: Start a garden planner, research flowers suited to your growing zone, or experiment with arranging fresh and dried flowers.

March: Spring Flowers, Trees, and New Growth

March marks the beginning of astronomical spring in the Northern Hemisphere. Several observances celebrate flowers, forests, and the natural environment, making it an excellent month to learn about plant growth and prepare outdoor growing spaces.

• March 1: World Seagrass Day
• March 3: World Wildlife Day
• March 11: Johnny Appleseed Day
• March 12: National Plant a Flower Day
• March 14: National Learn About Butterflies Day
• March 20 or 21: Spring Equinox
• March 21: International Day of Forests
• March 21: National Flower Day
• March 22: World Water Day
• March 28: National Weed Appreciation Day
• March 30: Take a Walk in the Park Day

Plant lover’s idea: Sow suitable flower seeds indoors, learn which native plants support butterflies, or identify common garden weeds before deciding which ones to remove.

April: National Gardening Month

April is one of the most important months on the gardening calendar. National Gardening Month encourages people to grow plants, while National Native Plant Month promotes species that naturally occur in local ecosystems. Earth Day and Arbor Day also draw attention to the environmental benefits of plants and trees.

• April 4: International Carrot Day
• April 5: National Dandelion Day
• April 6: National Tomato Day
• April 13: International Plant Appreciation Day
• April 14: National Gardening Day
• April 16: National Orchid Day
• April 17: Herbalist Day
• April 22: Earth Day
• April 26: International Seeds Day
• April 29: National Peace Rose Day
• Last Friday in April: Arbor Day (United States)

Monthly observances: National Gardening Month, National Native Plant Month, and Earth Month.

Plant lover’s idea: Start a container garden, refresh potting mixes, plant native flowers, or create a small herb garden on a sunny windowsill.

May: Plant Health, Herbs, and Pollinators

May has one of the largest collections of plant-related observances. Several days focus directly on growing vegetables, caring for plants, and appreciating the role of flowers and trees. World Bee Day and the International Day for Biological Diversity also highlight the connections between plants and wildlife.

• May 1: International Sunflower Guerrilla Gardening Day
• May 3: National Garden Meditation Day
• May 6: World Herb Day
• May 8: National Iris Day
• May 12: International Day of Plant Health
• May 13: Tulip Day
• May 15: Bring Flowers to Someone Day
• May 16: National Love a Tree Day
• May 18: Fascination of Plants Day
• May 18: World Therapeutic Horticulture Day
• May 19: World Plant a Vegetable Garden Day
• May 19: Plant Something Day
• May 20: World Bee Day
• May 20: Flower Day
• May 22: International Day for Biological Diversity
• May 29: Learn About Composting Day
• May 30: National Water a Flower Day
• First Saturday in May: World Naked Gardening Day
• First Saturday in May: National Herb Day

Additional observances: Gardening for Wildlife Month, International Compost Awareness Week, National Herb Week, National Wildflower Week, National Public Gardens Week, and National African Violet Week. Week-long dates vary.

Plant lover’s idea: Plant herbs or vegetables, learn to make compost, or choose flowering plants that provide nectar and pollen for local pollinators.

June: Roses, Herbs, and Summer Gardening

June celebrates roses, herbs, and the work involved in maintaining a healthy garden. With longer daylight hours and warmer weather across much of the Northern Hemisphere, gardeners often spend more time watering, pruning, weeding, and watching plants develop.

• June 5: World Environment Day
• June 6: National Gardening Exercise Day
• June 10: National Herbs and Spices Day
• June 12: National Red Rose Day
• June 13: National Weed Your Garden Day
• June 13: National Elderflower Day
• June 14: Nature Photography Day
• June 17: World Day to Combat Desertification and Drought
• June 20 or 21: Summer Solstice
• June 22: World Rainforest Day
• June 27: National Orange Blossom Day
• June 29: Lavender Day

Additional observances: National Rose Month, Perennial Garden Month, National Garden Week, and National Pollinator Week. Week-long dates vary.

Plant lover’s idea: Harvest fresh herbs, photograph flowering plants, or improve your garden’s watering routine. National Pollinator Week is also a good occasion to learn which flowers support bees, butterflies, and other beneficial insects.

July: Houseplants, Watering, and Conservation

July has fewer plant-related national days, but one of the most unusual is Take Your Houseplant for a Walk Day. The observance offers a lighthearted opportunity to learn about indoor plant care and the different growing conditions plants need.

• July 10: National Don’t Step on a Bee Day
• July 27: Take Your Houseplant for a Walk Day
• July 28: World Nature Conservation Day
• Second week in July: International Plants at Work Week

Monthly observance: Smart Irrigation Month.

Plant lover’s idea: Review your watering habits and check how sunlight changes throughout the day. If moving houseplants outdoors, protect them from sudden exposure to direct sunlight, strong wind, and temperature extremes.

August: Sunflowers and Homegrown Vegetables

August is associated with summer harvests, sunflowers, and seasonal garden maintenance. Several observances celebrate edible plants and the insects that help produce fruits, vegetables, and seeds.

• August 3: National Sunflower Day
• August 8: Sneak Some Zucchini onto Your Neighbor’s Porch Day
• August 19: National Potato Day
• August 31: National Diatomaceous Earth Day
• Third Saturday in August: World Honey Bee Day
• First full week in August: National Farmers Market Week

Plant lover’s idea: Collect seeds from suitable flowers, share excess homegrown vegetables, or visit a farmers market to discover locally grown produce.

September: Indoor Plants and Autumn Gardening

September is particularly interesting for houseplant owners because it includes National Indoor Plant Week. As daylight hours decrease in the Northern Hemisphere, many indoor plants begin growing more slowly, making this a useful time to review their care routines.

• September 4: National Wildlife Day
• September 7: National Acorn Squash Day
• September 16: International Day for the Preservation of the Ozone Layer
• September 21: International Day of Peace
• September 22 or 23: Autumn Equinox
• September 26: Johnny Appleseed Day
• Third week in September: National Indoor Plant Week
• Fourth Saturday in September: National Public Lands Day

Monthly observances: National Mushroom Month and National Honey Month.

Plant lover’s idea: Check houseplants for pests before bringing any outdoor plants inside. Adjust watering to changing light conditions and record which plants may need a different location during winter.

October: Mushrooms, Seeds, and Autumn Harvests

October brings several food-related observances that connect naturally to vegetable gardening, seed saving, and seasonal harvests. National Mushroom Day also provides an opportunity to explore fungi and their role in healthy soil ecosystems.

• October 1: World Vegetarian Day
• October 4: National Pumpkin Seed Day
• First Monday in October: World Habitat Day
• October 15: National Mushroom Day
• October 16: World Food Day
• October 24: National Food Day
• October 26: National Pumpkin Day
• First Wednesday in October: National Kale Day

Plant lover’s idea: Save seeds from suitable garden plants, make leaf compost, or learn how fungi help break down organic material and recycle nutrients in the soil.

November: Remembering Flowers and Preparing for Winter

November has relatively few gardening-specific observances. However, it can still be a useful month for caring for indoor plants, protecting outdoor growing spaces, and planning projects for the next growing season.

• November 1: World Vegan Day
• November 10: National Forget-Me-Not Day
• November 30: National Mason Jar Day

Plant lover’s idea: Organize seeds, clean gardening tools, and review your houseplant collection. Mason jars can also be used to propagate suitable plant cuttings in water.

December: Soil, Poinsettias, and Winter Plant Care

December includes World Soil Day, an international observance that highlights the importance of healthy soils for agriculture, ecosystems, and plant growth. National Poinsettia Day celebrates one of the best-known plants associated with the winter holiday season.

• December 5: World Soil Day
• December 11: International Mountain Day
• December 12: National Poinsettia Day
• December 21 or 22: Winter Solstice

Plant lover’s idea: Learn about soil structure and drainage, review the growing media used for different houseplants, or explore how to care for poinsettias after the holiday season.

More Gardening and Plant-Related Observances

In addition to individual national days, several month-long and week-long campaigns celebrate gardening, plants, and environmental awareness.

• April: National Gardening Month
• April: National Native Plant Month
• April: Kids Gardening Month
• April: Earth Month
• May: Gardening for Wildlife Month
• May: International Compost Awareness Week
• May: National Herb Week
• May: National Wildflower Week
• May: National Public Gardens Week
• May: National African Violet Week
• June: National Rose Month
• June: Perennial Garden Month
• June: National Garden Week
• June: National Pollinator Week
• July: Smart Irrigation Month
• September: National Mushroom Month
• September: National Honey Month
• September: National Indoor Plant Week