Family Owned Since 1979
Cultivating Gardeners



Product Description:

Mid-season 80-100 days. A marvel in potato breeding from Michigan State University, Blackberry is a gorgeous spud with super-saturated purple color through-and-through. These uniform, anthocyanin-packed, round potatoes are tasty and retain their deep color when cooked. Full-size, semi-erect plants are high producers and disease resistant.

Mini tubers are naturally bred, miniaturized seed potatoes that are produced in controlled, disease-free conditions. Field research shows that mini tubers out-perform standard cut potatoes, since the skin of the mini tuber remains intact and protects the seed. Simply plant each quarter-sized mini tuber individually and expect a harvest of 30-40 pounds of full-sized potatoes from each order of 10 mini tubers.

Mini Tubers begin shipping mid-March and shipping continues until we are sold out. We will prioritize orders for warmer zones to ship first and will avoid shipping to cooler zones until threat of freezing has diminished. Order early for best availability. Sorry, not available to US Territories or Canada.




Customer Reviews

Based on 4 reviews
Peter S.

They have been growing great! All 10 of them sprouted and have been growing prolifically with very little maintenance! I am very excited to see what the harvest will be. This is my first year growing them so I have my fingers crossed.

Lori C.
Very disappointed

These tiny potatoes arrived. I tried planting but nothing grew. Very disappointed.

Sorry to hear Blackberry isn't growing well for you. Blackberry is a mini tuber, which is a quarter-sized miniature seed potato, so it is expected that they would be small upon arrival. You can plant each mini tuber individually and should have a harvest of about 30-40 pounds of full-sized potatoes from each order of 10 mini tubers. As always, our products are backed by our full guarantee! We want you, our customers, to be 100% satisfied with the seed, plants and supplies that you purchase from us. If anything you buy from Territorial proves to be unsatisfactory, we will either replace the item (if available) or refund the purchase price (up to 1 year from purchase), whichever you prefer. Contact our customer service (Monday-Friday 8AM-5PM Pacific Time) at either 800-626-0866 or

Sarah T.
Beautiful and good yield

This deep purple tuber is gorgeous! Flavor and color were one of our favorites. Our yield was bountiful from our order last spring.


These were so easy to grow. Beautiful potatoes. However, I did not get even close to the harvest. I only got 4 pounds from 10 tubers. That's why I rated it 4 stars instead of 5.

Seed Depth 4-6"
Seed Spacing 12"
Row Spacing 24-36"

Solanum tuberosum Our favorite comfort food has proven to be an amazing source of nutrients and nourishment. High in vitamins, such as vitamin C, they rival broccoli as a source of phytonutrients. We offer only certified disease-free seed potatoes. Easy to grow, we will include complete cultural directions with each order.

Days to maturity are calculated from date of direct seeding.

• Potatoes prefer fertile, loose, well-drained soil
• Forking beds is recommended
• Apply a fertilizer that is low in nitrogen and high in phosphorus such as bone meal — use 5-7 pounds per 100 square feet
• Proper soil pH of 5.2-6.0 will help avoid scab
• Irrigate thoroughly when needed, allow the soil to dry out somewhat before watering again
Hilling: as plants grow, cover with soil, mulch, or compost, while leaving top-growth exposed
• Repeat hilling process 3-4 times throughout season

Direct Sowing
• Plant potatoes up to 3 weeks before your last frost date
• Larger potatoes can be cut into smaller pieces to use as seed — allow the cut potato to heal before planting to prevent rot (2-3 days at 70°F)

Insects & Diseases
• Common insects: Colorado potato beetle, tuber flea beetle, potato aphid, potato psyllid, potato tuber worm/moth
• Insect control: Pyrethrin and row covers
• Common diseases: Early and late blight, white mold, botrytis, leaf roll virus, mosaic virus, verticilium wilt, potato scab
• Disease prevention: 4-year crop rotation, and fungicide applications

Harvest & Storage
• "New" potatoes can be harvested from early varieties beginning 60 days after planting
• Once top-growth dies down, leave in the ground for 2 weeks and then harvest
• Dig tubers carefully, brush off soil and allow skins to dry before storing
• Standard potatoes yield about 10 times the amount originally planted
• Fingerling potatoes yield 15-20 times the amount originally planted
• Store in a dark location; 40-45°F and 90% relative humidity

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