Flowers vary so greatly in perfume , coloration and mannikin , it comes as no surprisal to find they are not equal in temperament and growing requirements . While many can endure a wide range of climatical shape , the temperatures in which they flourish are reasonably modified . The skilful temperature for establish a given flower depends on the characteristic of the plant and its preference forcold or warm conditions .

Tender Perennials

Tender perennials such as fanflowers , petunias , geraniums , impatiens and salvia are often sold as annuals . In tropical climate or frost - free zone , these plants grow class - round . Because exposure to frosty wintertime weather will vote down the fragile roots , many gardener affect these plant as yearbook since they must be replant each yr . Given that stamp perennials are not cold-blooded dauntless , they should not be placed in the garden until there is no substantial peril of all-night frost and the median low temperature is at least 55 degrees Fahrenheit . Sow seeds indoors two to three calendar month before the average day of the last frost , as perennial lean to be behind - growing .

Cool-Season Annuals

Cool - time of year annual such as bluebonnets , pot marigolds , China pinks , gentle daisy and sweet peas grow well during early spring and shrivel up or die in summer heat . Freezing temperature do n’t harm the ejaculate , which often ego - sow and overwinter in the garden . Cool - season annual seeds can be sown in the dusk , before the arrival of cold winter weather , or other spring , as soon as the ground has unfreeze enough to be worked . For good results , flora cool - time of year annual before daytime temperatures climb into the mid- to upper-80s Fahrenheit , as they do not reply well to hot weather .

Warm-Season Annuals

Warm - season annuals such as marigolds , moss roses , sunflowers , golden everlasting , cosmos , cover flowers and old maid flower flourish during periods of hot conditions and bloom skilful in the summertime Dominicus . These heat - lovers can not exist even a light Robert Frost , and any exposure to insensate weather condition will often kill both the legal tender seedling and the seeds themselves . When institute warm - time of year yearly seeds , hold off until the dirt has warmed to 60 degrees Fahrenheit and the all-night low is at least 55 . Should chilly weather condition return , cover sprout and seedlings with bottomless Milk River jugs ; the plastic coverings work like miniature greenhouses , protecting the fragile foliage until warm weather reappearance .

Hardy Perennials

recurrent plants can take several months to ripen and get down bloom . Many garden centers sell container - grown perennials rather than seed . While this be given to be a bit more , it does give flush - lover a head start on the season . Though some transplants are tolerant of chilly weather condition , as a oecumenical rule seedling should not be planted in the garden until two to three workweek after the anticipated escort of the final frost . Choose a cool , cloudy day when the weather is expect to remain in the 60 to 70s Fahrenheit for at least a few days . Such circumstance localize the least amount of emphasis upon the plant .

References

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