When to Plant Sweet Potato in Tucson, Arizona (85708)

Location

Tucson, Arizona

ZIP Code

85708

USDA Zone

Last Frost

Tuesday, February 10, 2026

📅 Your 2026 Planting Dates

Direct Sow Outdoors

Tuesday, February 10, 2026

Based on last frost Tuesday, February 10, 2026 · Zone 9b

Pro tip: Sow Sweet Potato directly outdoors around your last frost date when soil starts to warm.

Add to Calendar (.ics)

🌿 Plant Details

Scientific Name Ipomoea batatas

Days to Maturity 100 days

Mature Height 12-18"

Spread 36"

Type Vine

Fruit Size Medium-Large (6-12 oz per root)

☀️ Growing Requirements

☀️

Sun

Full Sun (8+ hours)

💧

Water

Moderate (reduce as harvest approaches)

↔️

Spacing

12" apart

🌱

Planting Depth

4" deep

Seeds typically germinate in 14-21 days

Ready to Plant Sweet Potato in Tucson?

Get your seeds now so they're ready by Tuesday, February 10, 2026.

🛒 Buy on Amazon 🌿 True Leaf Market

* Affiliate links — we may earn a small commission at no extra cost to you.

🤝 Good Companions

OkraDillThyme

⚠️ Avoid Planting Near

SquashSunflower

🤝

Full Companion Planting Guide for Sweet Potato

See which plants help Sweet Potato thrive, which to keep away, and raised bed layout tips →

🛠️ Supplies You'll Need

🪵 Raised Garden Bed 🌍 Vegetable Garden Soil 🛠️ Hand Trowel Set 🚿 Watering Can

* Affiliate links — we may earn a small commission at no extra cost to you.

Common Sweet Potato Varieties

Popular cultivars to look for at your local nursery or seed supplier.

Beauregard

orange 90d

The most widely grown orange-fleshed sweet potato; high yields and excellent flavor.

Covington

orange 95d

Rich orange flesh with smooth skin and sweet flavor; excellent storage quality.

Stokes Purple

purple 120d

Deep purple flesh with high anthocyanin content; nutty, slightly dry texture.

Hannah

white 90d

Pale tan skin with cream-colored flesh; mild, less sweet flavor — like a cross with regular potato.

🌾 Seed Saving Guide

🪴 Vegetative propagation

Propagate vegetatively, not by seed

Sweet potatoes are propagated from "slips" — sprouts grown from a stored tuber, not from seed in typical gardens.

Store tubers at 55–60°F in a humid spot. In spring, place in shallow water to grow slips for planting.

🪴

Raised Bed Planting Guides

A 4×8 bed fits 32 plants of Sweet Potato. See plant counts, spacing grids, and companion pairings for every bed size →

Frequently Asked Questions

When should I plant Sweet Potato in Tucson, Arizona? +

In Tucson (Zone 9b), direct sow Sweet Potato outdoors around Tuesday, February 10, 2026.

What is the last frost date for Tucson, Arizona? +

The average last spring frost date for Tucson, Arizona (ZIP 85708) is around Tuesday, February 10, 2026. This is based on NOAA climate normals for USDA Zone 9b.

How long does Sweet Potato take to grow? +

Sweet Potato typically matures in about 100 days from direct sowing. In Tucson, that means you can expect harvest around Tuesday, February 10, 2026 plus 100 days.

Should I start Sweet Potato indoors or direct sow in Arizona? +

Sweet Potato does best when direct sown outdoors. In Tucson, sow directly around Tuesday, February 10, 2026.

📚 More Sweet Potato Planting Guides

🗺️

Sweet Potato in Arizona

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 9b Sweet Potato Guide

All cities in your zone · Avg dates

→

Other Plants for Tucson

Blackberry Blueberry Raspberry Strawberry Basil Chamomile Chives Cilantro Dill Lavender Lemon Balm Marjoram Mint Oregano Parsley Rosemary Sage Tarragon Thyme Acorn Squash Artichoke Arugula Asparagus Beefsteak Tomato Beet Bell Pepper Bok Choy Broccoli Brussels Sprout Butternut Squash Cabbage Cantaloupe Carrot Cauliflower Cayenne Pepper Celery Cherry Tomato Chili Pepper Collard Green Common Bean Cucumber Eggplant Endive Fennel Garlic Grape Tomato Green Bean Habanero Pepper Head Lettuce Heirloom Tomato Honeydew Melon Jalapeño Pepper Kale Kohlrabi Leaf Lettuce Leek Lima Bean Mustard Okra Onion Parsnip Pea Poblano Pepper Pole Pea Potato Pumpkin Radicchio Radish Rhubarb Roma Tomato Rutabaga Serrano Pepper Shallot Snap Pea Snow Pea Spaghetti Squash Spinach Squash Sweet Corn Swiss Chard Tomato Turnip Watermelon Zucchini Sunflower Marigold Zinnia Nasturtium Cosmos Echinacea (Coneflower) Petunia Black-eyed Susan Apple Tree Pear Tree Peach Tree Plum Tree Sweet Cherry Tree Lemon Tree Borage Lemongrass Ginger Stevia Tomatillo Edamame Fava Bean Mâche Mizuna Sorrel Shishito Pepper Banana Pepper Watermelon Radish Napa Cabbage Popcorn Broccoli Raab Catnip Valerian Lemon Verbena Bee Balm Anise Lovage Chervil Summer Savory Dahlia Snapdragon Pansy Sweet Pea Morning Glory Hollyhock Larkspur Bachelor Button Columbine Impatiens Salvia (Annual) Sweet Alyssum Celosia Lupine Verbena Elderberry Grape Vine Red Currant Gooseberry Serviceberry Fig Tree Avocado Tree Persimmon Tree Olive Tree

Growing Sweet Potato in Zone 9b

Sweet Potato (Ipomoea batatas) is a popular garden vegetable. In Tucson, Arizona, which is in USDA Hardiness Zone 9b, you should direct sow seeds around Tuesday, February 10, 2026.

Your average last frost date is Tuesday, February 10, 2026. Sweet Potato grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.