Hey, Anne. That is cool. The seeds came from Burpee. From Pennsylvania. Well, I know Nasturtiums are edible. They are pretty flowers. They have pretty Autumn colors. The foilage is cool too. I planted some Cosmos Bright Lights from Burpee seeds. They bloomed up pretty. I like Nasturtiums also. I know their edible. I like their foilage also. I planted Cosmos seeds in small pots inside to start them out but packet does not say how often to water. Also, I live in Phx, AZ. I just love Cosmos! They grew so well in California… just add water.
And edible? Hi Jim Cosmos are a perfect choice for Texas. They thrive in hot dry conditions! Perhaps try growing some in a pot to get started. Happy gardening! My grandmother always had cosmos in her garden. I dare say they self seeded from year to year. Consider me a new convert. I will be sprinkling some cosmos seed in the Sanctuary mix in the near future. Thanks so much for the feedback Fran. Much less work! As I mentioned in the article, I always start with organic seeds especially if planning to eat the flowers.
They come in some many delightful colours — I have yellow in my garden at the moment and they are just SO cheerful.
I must take some pics of the petals in a salad. They look so pretty in a vase of mixed blooms and herb flowers too. Cosmos plants do well in moist soil conditions. If the soil dries out completely the roots will die back and it will be tough for the plant to recover.
On the other hand, if the roots are exposed to standing water for too long, they can rot. A Ceramic Self Watering Planter filled with a standard potting mix self-regulates to keep the soil at consistent moisture for your plant to thrive and no watering guesswork for you. Let the top of the soil dry out between watering. New Cosmos plants can be started from seed, propagated from an established plant, or purchased live at many garden centers.
We prefer to sprout from seed or propagate from a stem cutting, as it results in plants that are adapted to your growing conditions and limit the chances that you accidentally bring home pests. Cosmos grow quickly from seed. Sprouts typically appear in 7 days but can be as quick as 5 days or as long as 10 days depending on your conditions.
Next, remove the lower leaves, so the bottom half is just stem. Place the glass on a bright windowsill and change the water every few days. In a couple of weeks, roots should emerge and you can transplant them into your container. Live starter plants give you a big jump start on your first harvest. Leaves should be dark green without holes, spots, or curled edges.
We still recommend taking advantage of your bright window sunlight is free and great for plants! For an introduction to grow lights, head over to our post on grow lights for indoor gardeners.
In order to provide an equivalent amount with a grow light, it needs to be pretty bright! Native to Mexico, these delicate-looking plants thrive in U. Department of Agriculture plant hardiness zones 8 to Cosmos are typically sown outdoors where they are to grow, but you can get the plants off to an early start by planting seeds indoors. Transplants can be set outdoors as soon as the danger of frost has passed during the spring and summer.
By starting seeds indoors every week or two you can have a supply of cosmos to fill in the garden spaces as other types of early-flowering plants fade. Start cosmos seeds in flats or pots indoors. Planting containers should be at least 3 inches deep with drainage holes. Avoid planting in a rich soil; it can cause the plants to get too tall and flop over.
You can prevent drooping by staking the plants or growing them close to other plants that can support them. Once established, you will not need to water your cosmos plants unless there is a prolonged drought. Where water is limited, these are the last plants that require irrigation. Hot weather is ideal for cosmos, and they thrive in any humidity level. Fertilizing can negatively impact cosmos.
Cosmos can handle poor soil. Too much fertilizer can often lead to strong plants with lots of foliage but few blooms. Unless your plants seem to be struggling, these plants do not need fertilizer. There are over 25 species of cosmos. However, three species are most commonly used in gardens in landscaping.
With golden yellow blooms, it is very drought tolerant and loves hot weather. The plant grows 2 to 6 feet tall and comes in double and semi-double flowers. Some of the more recent cultivars tend to be shorter, more orangy, and with smaller flowers.
Cosmos bipinnatus are colorful daisy-like flowers that come in white, pinks, reds, and orange. At 1 to 4 feet in height, they are shorter than C. Although they are not quite as heat tolerant as C. Chocolate cosmos are a separate species: Cosmos atrosanguineus. The dark red flowers smell like chocolate. This perennial is hardy to USDA zone 7 , but it is higher maintenance than annual cosmos.
Like dahlias, it grows from tubers. Other common cosmos cultivars include:. The only real maintenance cosmos plants need is deadheading which will prolong the flowering season. If you fall behind, shear the plants by about one-third, when most flowers have faded. This kind of pruning produces a second flush of leaves and flowers. By the end of the season, you can cut off the plants at ground level or pull them up, roots and all. However, if you leave the plants in place, they may self-seed for the following growing season.
Cosmos plants readily self-seed. It's best to propagate these plants after the threat of frost is gone. Although sowing seeds is the best and easiest way to propagate this plant, you can also propagate via stem cutting. When you take stem trimmings, it stimulates more leaf and flower growth. Besides seed, stem cutting is the best way to propagate this plant. Here's how you do it:. Cosmos are straightforward to grow from seeds.
Start seeds indoors , four to six weeks before the last frost. Or if you can sow cosmos outdoors directly in the garden well after the threat of frost is gone.
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