Every year plant and garden lovers have a large number of official plant themed days to highlight or honour our plants and the insects that help our gardens bloom. Below is a list of official days for plant lovers to celebrate.
January

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- 4 January – Free Flower Basket Day
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- 5 January – Hydrangea Day
- 6 January – Bean day, Apple Tree Day
- 10 January – Houseplant Appreciation Day
- 15 January – National Tulip Day (Holland)
- 19 January – International Flower Day
- 28 January – Daisy Day
- 29 January – National Carnation Day (US)
- Last Saturday of January – National Seed Swap Day
February

- February – National Cherry Month (US), National Peanut Month (US), National Bird Feeding Month (US)
- 3 February – Feed the Birds Day
- 5 February – National Primrose Day (US), National Hydrangea Day (US)
- 7 February – Rose Day (India)
- 10 February – World Pulses Day
- 17 February – National Cabbage Day (US)
- 23 February – National Chilli Day (US)
- 26 February – National Pistachio Day (US)
- 28 February – Floral Design Day
- 28 February to 4 March – National Invasive Species Week
March

- March – Gardening, Nature and Ecology Books Month
- March – National Flower Month (US)
- March – Earth Month
- 1 March – Dekopon Day (Japan)
- 3 March – Peach Blossom Day
- 7 March – Plant Power Day, World Hyacinth Day
- 12 March – Plant a Flower Day (US)
- 14 March – Learn About Butterflies Day
- 18 March – Broccoli Day
- 21 March – International Day of Forests
- 28th March – National Weed Appreciation Day (US)
April

- April – National Lawn and Garden Month (US), National Gardening Month (US), National Pecan Month, Kid’s Gardening Month
- 4 April – International Carrot Day
- 5 April – Dandelion Day
- 6 April – California Poppy Day, Fresh Tomato Day
- 9 April – Pansy Day
- 13 April – International Plant Appreciation Day
- 14 April – Pecan Day
- 16 April – Orchid Day
- 17 April – Herbalist Day
- 19 April – National Garlic Day (US)
- 20 April – National Lima Bean Respect Day (US)
- 21 April – International Hemp Day
- 22 April – Earth Day
- 26 April – International Seeds Day
- 29 April – Arbor Day, National Peace Rose Day (US)
May

- May – Gifts From the Garden Month, National Salad Month (US)
- 1 May – May Day (Northern Hemisphere), International Sunflower Day
- 3 May – Garden Meditation Day
- 4 May – National Candied Orange Peel Day (US)
- 7 May – World Naked Gardening Day, Herb Day
- 8 May – Iris Day, Lilac Sunday
- 12 May – International Day of Plant Health
- 16 May – Love a Tree Day
- 19 May – World Plant a Vegetable Garden Day
- 20 May – World Bee Day, Pick Strawberries Day
- 29 May – Composting Day
- 30 May – Water a Flower Day
June

- June – Perennial Garden Month
- 10 June – Herbs and Spices Day
- 19 – 25 June – National Pollinator Week (US), National Garden Week (US)
- 5 June – World Environment Day
- 6 June – National Gardening Exercise Day (US)
- 10 June – National Herbs and Spices Day (US)
- 11 June – National Corn on the Cob Day (US)
- 12 June – Red Rose Day
- 13 June – National Weed Your Garden Day (US)
- 15 June – World Catnip Awareness Day
- 16 June – Fresh Veggies Day
- 17 June – Eat Your Vegetables Day
- 27 June – National Onion Day (US), National Orange Blossom Day
- 29 June – Lavender Day
July

- July – Smart Irrigation Month, National Blueberry Month (US)
- 3 July – Eat Beans Day
- 8 July – National Blueberry Day (US)
- 9 July – National Lavender Day (US)
- 10 July – Pick Blueberries Day, Don’t Step on a Bee Day
- 12 July – Orange Day
- 16 July – Fresh Spinach Day
- 22 July – National Mango Day (US)
- 27 July – Take Your Houseplant For a Walk Day
- 31 July – National Avocado Day (US), National Tree Day (Australia)
August

- August – National Peach Month
- 8 to 14 August – National Allotment Day (UK)
- 3 August – National Watermelon Day
- 5 August – National Mustard Day (US)
- 9 August – Melon Day (Turkmenistan)
- 19 August – National Potato Day (US)
- 20 August – World Honey Bee Day
- 22 August – World Milk Plant Day
- 26 August – Daffodil Day
- 29 August – More Herbs, Less Salt Day (US), National Lemon Juice Day (US)
September

- 1 September – Wattle Day (Australia)
- 2nd September – World Coconut Day
- 9 September – National Chrysanthemum Day (Japan)
- 18 September – World Bamboo Day
October

- 4 October – National Pumpkin Seed Day (US)
- 13 October – Global Fertiliser Day
- 14 October – Waratah Day (Australia)
- 21 October – World Earthworm Day
- 26 October – National Pumpkin Day (US)
November

- November – National Pomegranate Month (US)
- 10 November – Forget-Me-Not Day
- 24 November – Maize Day
- 26 November – World Day of the Olive Tree
December

- 1 December – Eat a Red Apple Day, National Mistletoe Day (US)
- 3 December – National Tree Planting Day (Zimbabwe)
- 4 Dec – World Pear Day
- 5 December – World Soil Day
- 12 December – National Poinsettia Day