Nasturtium

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Botanical name: Tropaeolum majus

Plant type: Flower

Sun exposure: Full Sun

Flower color: Red, Orange, Yellow

Bloom time: Summer, Fall

Nasturtium is an easy-to-grow annual whose leaves and flowers are edible. These plants with their bright greenery and vibrant flowers are good for containers or ground covers. Their pretty fragrance also makes them a good choice for cut flowers. Nasturtiums are perfect to grow with children because they grow so easily and rapidly.

Planting

  • You can start the seeds indoors 4 to 6 weeks before the last spring frost.
  • Plant seeds in early spring in moist, well-drained soil in full sun. They can grow in partial shade, but they will not bloom as well.
  • Nasturtiums prefer poorer soils and they do not need fertilizers (unless your soil is extremely poor). Fertile soil will produce fewer blooms.
  • Plant the seeds about half an inch deep and 10 to 12 inches apart. Plants should appear in 7 to 10 days.

Care

  • Water regularly throughout the growing season, but be careful not to over-water your plants.
  • Cutting off the faded/dead flowers will prolong blooming.
  • If you're growing nasturtiums in containers, they may need to be trimmed back occasionally over the growing season.

Pests

Recommended Varieties

  • Salmon Baby, to add a pretty salmon-pink color to your garden.
  • Variegatus, which is a trailing type with red or orange flowers.
  • Peach Melba, which is derived from nasturtiums and has creamy yellow flowers with orange-red centers.

Comments

By Anonymous on May 15

This recipe is AWESOME on any warm bread/rolls. Take bloomed flowers, remove stamens inside, gently rinse in cool water, air dry on paper towels. When dry, chop up and mix with softened butter and honey. OMG! My daughter begs me to plant nasturtium every year for this recipe! So yummy!

By Almanac Staff on May 16

Thanks for sharing! Yes, nasturtiums are edible flowers! The flowers and leaves are peppery flavored like watercress and are used in salads and as a garnish.

By Anonymous on May 10

I live in Orlando, FL and am just starting my hand at growing and in the above article it mentioned planting 4-6 wks before the last spring frost. That point has passed, is it still fine to plant them or should I wait for a better time of year here in my area?

By Almanac Staff on May 16

You can plant the seeds from spring through fall throughout Florida, year-round in South Florida. Nasturtiums are easy to grow where you live!

By Anonymous on May 3

my son came home with a seed in a pot a while ago, its just started flowering and i have identified it as a nasturtium, it is currently in the kitchen window and is growing rapidly, its getting rather tall, currently about 2 foot tall, does it need trimming to stop it gaining height or do you just leave them to grow? thanks

By Almanac Staff on May 16

When plants of the tall type are about 7 inches tall, place a stake or trellis near them for support. It is not necessary to stake or trellis the dwarf type.

By Anonymous on April 27

Hi, I just bought nasturtium, sweet pea and zinnia seeds. It is the end of April in the Columbus area. Should I sow the seeds into the soil directly right now, or should I start them inside? OR- should I wait and sow them into the garden in a few weeks. Thanks!

By Anonymous

Will nasturtiums handle full sun in the humid summers of Raleigh?

By Almanac Staff

In your area, nasturtiums do best blooming in spring/early summer. Sow mid-March or earlier in pots. Or, you could also sow in late summer for fall bloom.

By Anonymous

I have just picked some large green seeds. Can I plant them right away or do they have to dry.It is April first and I live in New Orleans.

By Almanac Staff

You want to grab those seeds when they are still green and let them dry on a baking sheet in a cool dark place for a week. Once they are hard, you can store them for next year.

By Anonymous

I planted Nasturtiums from seed in hanging pots (about 4-6 inches deep with about 6 - 18" spacing), roughly 4-6 wks ago. I They get full sun from 12ish to 7pm in the Houston heat. I am doing best to provide terrible conditions, which they seem to love. I have 3 doing well with several arms coming off on each. I am anxious for them to bloom...is that more of a summer event even in Houston?

By Almanac Staff

In Houston, nasturtiums do best in the cooler months. You can plant them in the early fall, in which case they might bloom later in the fall before a frost stops them; the plants may even survive through the winter if it is an especially mild one.

You can also plant in early spring after the last expected spring frost date. They will bloom until the hot weather starts; peak bloom is usually about May into June.

They do not like high heat. When summer hits, move the containers to deep shade, and keep up with the watering. The plants may perk up again in fall to give you another floral display.

(Please note: We'd recommend sowing nasturtium seeds about 1/2 inch deep.)

Hope this helps!

By Anonymous

My nastartiums are in a pot and under a shade but gets full sun in the morning but they stop growing about 9inch and stay at the same tall without blooming or any change! What can I do? Thanks

By Almanac Staff

Some thoughts: They grow in shade but not quite as well as full sun; too much shade limits their blossoms. Also, make sure you are not using any fertilizer. They thrive on neglect--poor, lean soil and spare watering.

By Anonymous

I've just purchased a couple 4" pots of Empress of India from Annie's Annuals. Her stuff is usually good, so I'm not gonna be afraid to transplant them with lots of soil, my question... is the Empress a climber or bush variety?
Thanks, barb

By Almanac Staff

The Empress of India is a non-trailing annual and quite compact (only 1 foot high).

By Anonymous

Can I purchase nasturtium plants. Seeds have not done well for me.

By Almanac Staff

You'll have to check with your local garden center, but nasturtiums do not fare well when transplanted; use peat pots and plant these directly in the soil. Nasturtiums are one of the easiest flowers to grow from seed. They prefer full sun. They are not choosy about their soil, though they prefer a light, sandy soil. Don't spoil them with rich, fertile soil and fertilizers as this will only result in lush foliage and few blooms.

By Anonymous

hi, the leaves on my nasturtium have gone dimply. do you have any thoughts?
trudy

By Almanac Staff

The bumps could be insect damage. Spray with a horticultural oil or insecticidal soap spray.

By Anonymous

thank you!

By Anonymous

I planted my seedlings from seed packets and they r growing tall but I was wondering how much will grow from a seed and if I should seperate each stem/seed growing or if I keep them together will it be too crowded? Never grown them before

By Almanac Staff

Following spacing on packet. As the seedlings grow: If the plants are crowded then thin them out to about 12 inches apart.

By Anonymous

do nasturtiums come up every year ???

By Almanac Staff

Nasturiums are an annual so they need to be seeded each spring. However, if you let them go to seed, they may self-seed in the fall and come up the following year on their own.

By Anonymous

If the expensive pkg of red nasturium seeds grew into a faded yellow flower does that mean i put too much miracle grow on them to begin with or what else could it be?

By Almanac Staff

If it's not meant to be a pale yellow variety, then it may be the weather. This flower enjoys cool soil. If the ground is too hot, forget it. Plant in a shady spot that gets some morning sun and water consistently.

By Anonymous

My flowers are in window boxes in partial sun. Some of the leaves are turning yellow. Is this a sign of over watering?

By Almanac Staff

Yellow leaves are a sign of over watering. Nasturtiums prefer really dry soil, even in the summer months!

Make sure that the soil is well-drained.

Thank you for your interest in the Old Farmer's Almanac and our Web site.

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