One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.
The first opportunity to plant sweet sultan in South Houston should be estimated by looking at the USDA zone info.
Planting Calendar for Sweet Sultan
Frost tolerance for sweet sultan: | Tolerant of a very small amount of frost. |
When to plant: | Up to 3 weeks before last frost. |
Since sweet sultan are one of those plants that can tolerate a tiny bit of cold weather you can plant them slightly earlier in the year than other plants that might not handle the cold.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
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Legend | |
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![]() | A good time to plant sweet sultan |
![]() | Possibly ok, but a risky time to plant sweet sultan |
![]() | Probably not a good time to plant sweet sultan |
The earliest that you can plant sweet sultan in South Houston is February. However, you really should wait until March if you don't want to take any chances.
The last month that you can plant sweet sultan and expect a good harvest is probably September. You probably don't want to wait any later than that or else your sweet sultan may not have a chance to really do well. You can get started a little bit earlier by starting your sweet sultan indoors.
Last Frost Date
In South Houston the average date of last frost happens on February 15. In the coldest months of winter you can expect an average low temperature of 20°F.
Since the USDA zone info for South Houston is an average the actual date of last frost will vary from year to year. Since half of the time in South Houston last frost occurs after February 15 be ready to protect your sweet sultan if you have a late frost.
USDA Zone Info for South Houston
Here is the info for USDA Zone 9a.
Average Date of Last Frost (spring) | February 15 |
Average Date of First Frost (fall) | December 15 |
Lowest Expected Low | 20°F |
Highest Expected Low | 25°F |
This means that on a really cold year, the coldest it will get is 20°F. On most years you should be prepared to experience lows near 25°F.
Plants to Grow in South Houston
You may be interested in your other planting guides for South Houston.
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