Yes, some chrysanthemums are frost-resistant, particularly garden chrysanthemums (Chrysanthemum morifolium), also known as "hardy mums." These varieties can survive winter in USDA hardiness zones 5-9, provided they are planted early enough in the season to establish strong roots before frost. 

To improve their frost resistance: 

• Mulch heavily after the first frost to insulate the roots. 

• Avoid cutting back the foliage in fall; it can provide extra protection. 

• Florist chrysanthemums, often sold as potted plants, are generally not winter-hardy and are grown as annuals. 

Chrysanthemums typically bloom in late summer to fall, with their peak bloom period being September to November. They are often associated with autumn gardens due to their late blooming nature. 

Some varieties can bloom earlier in mid-summer if planted in spring and provided with long daylight exposure 

Yes, chrysanthemums are toxic to cats. They contain compounds like pyrethrins and sesquiterpene lactones, which can cause symptoms such as vomiting, diarrhea, drooling, and skin irritation if ingested or touched. 

If you suspect your cat has come into contact with or eaten chrysanthemums, contact a veterinarian immediately. 

Chrysanthemums can be mildly toxic to humans. Skin contact may cause irritation or allergic reactions, and ingestion can lead to nausea, vomiting, or diarrhea. Pollen may irritate sensitive individuals. To avoid issues, wear gloves when handling them, wash hands after, and keep them out of reach of children. 

Chrysanthemums typically bloom for 4-8 weeks, depending on the variety and care. Removing spent flowers (deadheading) and maintaining proper watering and fertilization can extend the blooming period. 

Planting: 

• Plant chrysanthemums in spring to allow their root systems to establish before winter. 

• Choose a sunny spot with well-draining soil enriched with compost or organic matter. 

Watering: 

• Keep the soil consistently moist but not waterlogged. Deep watering encourages healthy root growth. 

Fertilizing: 

• Use a balanced fertilizer (10-10-10) every 2-4 weeks during the growing season to promote lush foliage and abundant blooms. 

Pruning: 

• Pinch back the growing tips several times in spring and early summer to encourage bushier growth and more flowers. 

Winter Care: 

• For hardy varieties, mulch heavily in fall to protect the roots. 

• For non-hardy varieties, either treat them as annuals or dig up the roots and store them in a cool, dark place indoors over winter. 

Yes, most of them are! Chrysanthemums are typically perennial, which means they’ll come back year after year if you treat them right. That said, it depends a little on the variety and your local climate. In mild winters, they’re quite happy outdoors. Just give them a cosy spot, a little trim after flowering, and they’ll reward you with those lovely blooms again next autumn!

If you’d like your chrysanthemums to be in full bloom for All Saints’ Day (1st November), timing is everything. Generally, you’ll want to plant young chrysanthemum plants in spring (April to May) so they have the whole summer to settle in. They’ll naturally flower in late October to early November.

Pro tip: go for late-flowering varieties and give them a sunny spot. That way, you’ll have the best chance of those perfect autumn blooms right on time!