One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.
One way of making a decision about when it's the best time to plant four o' clock is to look at the USDA zone info for Monticello.
Planting Calendar for Four O' Clock
Frost tolerance for four o' clock: | Not tolerant of frost. |
When to plant: | After the last frost when the weather gets warmer. |
It's not a good idea to plant four o' clock until after the last frost when the weather gets warmer because they do not do well in cold weather.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
---|---|---|---|---|---|---|---|---|---|---|---|
Legend | |
---|---|
A good time to plant four o' clock | |
Possibly ok, but a risky time to plant four o' clock | |
Probably not a good time to plant four o' clock |
The earliest that you can plant four o' clock in Monticello is May. However, you really should wait until June if you don't want to take any chances.
The last month that you can plant four o' clock and expect a good harvest is probably August. Any later than that and your four o' clock may not have a chance to grow to maturity. If you are starting your four o' clock indoors then you might be able to get away with starting them a few weeks earlier.
Last Frost Date
The average date of last frost is May 15 in Monticello. In the coldest months of winter you should expect an average low temperature of -25°F.
It's important to remember that USDA zone info for Monticello may not be accurate from year to year and the actual date of last frost changes from year to year. Since half of the time in Monticello it frosts late in the year after May 15 be ready to cover your four o' clock in the event of a late frost.
USDA Zone Info for Monticello
Here is the info for USDA Zone 4b.
Average Date of Last Frost (spring) | May 15 |
Average Date of First Frost (fall) | September 15 |
Lowest Expected Low | -25°F |
Highest Expected Low | -20°F |
This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.
Plants to Grow in Monticello
You may be interested in your other planting guides for Monticello.
Vegetables
- Artichokes
- Asparagus
- Asparagus lettuce
- Asparagus peas
- Beets
- Bell Peppers
- Bittercress
- Black pepper
- Black radish
- Bok Choi
- Broccoli
- Brussels Sprouts
- Bunching Onions
- Cabbage
- Cantaloupes
- Carrots
- Cauliflower
- Celeriac
- Celery
- Chard
- Chicory
- Chinese cabbage
- Chives
- Corn
- Corn salad
- Cucumbers
- Eggplants
- Endive
- Fennel
- Field Peas
- Garden cress
- Garlic
- Gherkins
- Green beans
- Hamburg root parsley
- Iceberg lettuce
- Indian cress
- Jerusalem artichokes
- Kale
- Kohlrabi
- Leeks
- Lettuce
- Melons
- Mustard greens
- Napa cabbage
- Neeps
- New Zealand spinach
- Okra
- Onions
- Parsnip
- Pea
- Peanut
- Pearl onions
- Peas
- Pole beans
- Potatos
- Pumpkins
- Purslane
- Radicchio
- Radishes
- Red cabbage
- Rhubarb
- Romaine lettuce
- Romanesco
- Runner beans
- Salsify
- Savoy cabbage
- Scallions
- Shallots
- Snap beans
- Snow peas
- Spinach
- Squash
- Strawberries
- String beans
- Sweet corn
- Sweet Potatos
- Tomatos
- Tree onions
- Turnips
- Watercress
- Watermelon
- Welsh onion
- Zucchini
Herbs
Flowers
- Abutilon
- Achillea
- Achimenes
- Aegopodium
- African Daisy
- Ageratum
- Ajuga
- Alstromeria
- Alternanthera
- Alternaria
- Alyssum
- Amaranthus
- Anagallis
- Anchusa
- Anemone
- Angelonia
- Angel's Trumpets
- Arabis
- Arctotis
- Argyranthemum
- Armeria
- Artemesia
- Asparagus Fern
- Asters
- Astilbe
- Aubretia
- Aubrieta
- Aurinia
- Axilflower
- Baby Blue Eyes
- Baby's Breath
- Bachelor Buttons
- Bacopa
- Balloon Flower
- Balsam
- Banana
- Basket of Gold
- Bee Balm
- Begonias
- Bellis
- Bells of Ireland
- Bidens
- Bishop's Weed
- Black Eyed Susans
- Bleeding Hearts
- Bloodleaf
- Blue Lace Flowers
- Blue Throatwort
- Bougainvillea
- Bower Vine
- Brachycome
- Browallia
- Brunfelsia
- Buddha belly plant
- Bunny Tails grass
- Caladium
- Calendula
- Calibrachoa
- California Poppy
- Calla Lily
- Calliopsis
- Campanula
- Candytuft
- Canna
- Cardinal Flower
- Carnation
- Catharanthus
- Celosia
- Centaurea
- Cerastium
- Chocolate Daisy
- Chrysanthemum
- Chrysanthemums
- Chrysocephalum
- Cigar Plant
- Cleome
- Clover
- Coleus
- Columbine
- Common hollyhock
- Copperleaf
- Coral Bells
- Coreopsis
- Cosmos
- Crassula
- Creeping Phlox
- Creeping Zinnia
- Crossandra
- Cuphea
- Dahlberg Daisy
- Dahlia
- Dahlias
- Dallas Fern
- Datura
- Daylily
- Decorative Kale
- Delphinium
- Dianthus
- Diascia
- Dichondra
- Didiscus
- Digitalis
- Dipladenia
- Doronicum
- Dracaena
- Dusty Miller
- Echinacea
- Elephant Ears
- English Daisy
- Erysimum
- Euphorbia
- Evolvulus
- Fanflower
- Felicia Daisy
- Festuca
- Feverfew
- Fiber Optic Grass
- Firebush
- Flax
- Flowering Kale
- Flowering Maple
- Flowering Tobacco
- Flower-of-an-Hour
- Forget-Me-Not
- Fountain Grass
- Four O' Clock
- Four-o-clock flower
- Foxglove
- Fuchsia
- Gaillardia
- Galium
- Garden Mums
- Gayfeather
- Gazania
- Geranium
- Gerbera
- Geum
- Gladiolus
- Gloriosa Daisy
- Gloriosa Lily
- Gomphrena
- Guara
- Gypsophila
- Hamelia
- Hardy Asters
- Hardy Hibiscus
- Helianthemum
- Heliotrope
- Hemerocallis
- Heuchera
- Hibiscus
- Hollyhocks
- Hosta
- Hypericum
- Iberis
- Iceland Poppy
- Impatiens
- Iresene
- Jasmine
- Lantana
- Larkspur
- Lavender
- Lavender Cotton
- Lenten Rose
- Liatris
- Lisianthus
- Lithospermum
- Livingstone Daisy
- Lobelia
- Lotus Vine
- Lunaria
- Lupine
- Lysimachia
- Maltese Cross
- Marguerite Daisy
- Marigold
- Matricaria
- Mecardonia
- Melampodium
- Mexican Feather Grass
- Millet
- Mimulus
- Missouri Primrose
- Monarda
- Money Plant
- Monkey Flower
- Moon Vine
- Morning Glory
- Myosotis
- Napa Valley Fern
- Nasturtium
- Nemesia
- Nicotiana
- Nierembergia
- Nigella
- Nolana
- Oenothera
- Oleander
- Oriental poppies
- Ornamental Grasses
- Osteospermum
- Oxalis
- Painted Daisies
- Painted Tongues
- Pampas Grass
- Pansies
- Pennisetum
- Penstemon
- Pentas
- Peonies
- Perilla
- Periwinkles
- Petunias
- Phlox
- Pincushion Flower
- Platycodon
- Plectranthus
- Polka Dot Plant
- Polygonums
- Poppies
- Portulaca
- Primroses
- Primula
- Purple Bell Vines
- Purple Coneflower
- Purple Rock Cress
- Pyrethrum
- Red Hot Pokers
- Regal Geranium
- Rock Cress
- Roses
- Ruby Grass
- Rudbeckia
- Sagina
- Salpiglossis
- Salvia
- Santolina
- Sanvitalia
- Saxifraga
- Scabiosa
- Scaevola
- Scarlet Pimpernels
- Scarlet Runner Beans
- Schizanthus
- Scutellaria
- Sedum
- Shasta Daisys
- Skullcap
- Snapdragons
- Snow-in Summer
- Statice
- Steirodiscus
- Stocks
- Stoneseed
- Strawflowers
- Streptocarpella
- Sunflowers
- Sutera
- Swan River Daisy
- Sweet Peas
- Sweet Potato Vine
- Sweet Sultan
- Sweet Williams
- Sweet Woodruff
- Tagetes
- Tall Phlox
- Thunbergia
- Tithonia
- Torch Lilys
- Torenia
- Trachelium
- Trailing Portulaca
- Transvaal Daisy
- Trifolium
- Tritoma
- Tropical Hibiscus
- Tropical Water Plants
- Twinspur
- Verbena
- Veronica
- Vinca Vine
- Violas
- Violets
- Xerianthemum
- Yarrow
- Zinnia