Nowadays, you may find a wide range of cultivars of the same plant bearing hues of magenta, orange, pink, purple, white, and yellow. With little care you are rewarded with some eye-catching blossoms which appear in mid-summer and last through the end of the growing season.
However, during the first year after transplanting, young plants require about an inch of water every week in order to develop their taproots. Once the plants get established, they become drought resistant to a great extent and thus, can do well in drier soil.
The plants will obtain their required moisture from rain, except in extremely dry days. So, if there has been no rain for 1 to 2 weeks, then you must consider watering them yourself. But take care not to make the soil soggy.
The soil type must be fertile and if not, then work in a little compost and supplement it with a good organic fertilizer. The soil must also be well-drained and it must not be constantly damp. In areas, where the moisture level is high, it is best if you grow it in a raised bed.
A general, all purpose, slowly dissolving fertilizer is preferable for feeding young echinacea plants, during the first and second years of growth. This has to be done once in late spring. Sprinkle the fertilizer on the soil around the base of the plants.
Take care not to cause the mixture to come in contact with new stems or leaves. Older plants do not require fertilizing, unless they're growing in poor soil.
Aphids, caterpillars, grasshoppers, Japanese beetles, leafhoppers, and whiteflies are the common pests which are known to affect the echinacea. Also, aster yellows, powder mildew, and root rot are diseases that are commonly observed.
Place the seeds 2" apart from each other and sow at a depth of 1/4" in the soil. When the seedlings grow to an inch tall, they must be 18'' apart. Look out for weeds, as this plant does not compete well with them.