What to plant this week in Tulsa, OK
With temperatures hovering near the 5°F minimum zone floor and your last frost date safely behind you on March 28, Tulsa gardeners are entering a prime window to push warm-season crops into full production. This week marks the critical transition where early sowings like bush beans and French marigolds begin maturing, requiring immediate attention before the summer heat fully sets in.
The next 7 days
Tulsa, OKGrowing in Tulsa right now
- Tulsa's flat topography creates rapid soil drying; apply 2-3 inches of organic mulch around newly sown squash and zucchini to lock in moisture during our typical spring dry spells.
- Our local clay-heavy soils can be tricky for drainage, so ensure planting holes for transplanted herbs like basil are dug deep enough to break the pan before adding amendments.
- Take advantage of the narrow window between March 28 and mid-April to finish cold-sensitive starts; wait no longer or you risk missing the optimal pollination period.
Sow this week
4 crops- Bush Bean
- French Marigold
- Yellow Summer Squash
- Zucchini
Transplant this week
Nothing is due to go out this week.
Harvest soon
37 crops- Basil
- Borage
- Bush Bean
- Cantaloupe
- Cleome (Spider Flower)
- Cosmos
- Cowpea (Black-Eyed Pea)
- Cucumber
- Edamame
- Fennel
- Flour Corn
- French Marigold
- Garden Verbena
- Garlic
- Gourd (Ornamental/Bottle)
- Honeydew Melon
- Lima Bean
- Loofah (Luffa)
- Malabar Spinach
- Nasturtium
- Okra
- Pole Bean
- Pumpkin
- Roselle (Cranberry Hibiscus)
- Scarlet Runner Bean
- Shiso (Japanese Basil)
- Summer Savory
- Sunflower
- Sweet Corn
- Sweet Potato
- Thai Basil
- Vinca (Madagascar Periwinkle)
- Watermelon
- Winter Squash
- Yellow Summer Squash
- Zinnia
- Zucchini
Seasonal tips
- Start succession sowing with Pole Beans or Peas every two weeks for a continuous supply of fresh pods.
- Pinch back the tops of Basil to encourage bushier growth before the heat sets in.
- Apply a light layer of compost around harvested crops to replenish soil nutrients.
Pest & disease watch
- Watch closely for cutworms on your newly sown bean and squash rows, as they are highly active in our current fluctuating soil temperatures.
- Aphid populations are beginning to rise on young fennel and cosmos seedlings; inspect undersides of leaves daily during this humid transition period.
Watering this week
Provide about 1 to 2 inches of water per week, ensuring deep watering during hot afternoons.
Harvest Basil in the morning when essential oils are most concentrated for peak flavor.
Tulsa gardening questions
3Is it safe to plant my okra seeds now in Tulsa?
Yes, since the last frost average is March 28, your soil has likely warmed enough for these heat-loving beans to germinate successfully without delay.
Can I harvest my basil and borage right now?
Absolutely; both are listed in your 'harvest soon' window, meaning they have reached peak flavor and tenderness for immediate use.
How do I protect my sweet potatoes from our local clay soil?
Tulsa's heavy subsoil can suffocate young roots, so mound your slips onto a raised bed or hill of loose compost before covering with the native soil.
Other cities in zone 7b
12See the full zone 7b guide → · Plan your Tulsa garden in SproutGuide →