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How to grow a sweet potato plant indoors?

Published in Indoor Plant Care 4 mins read

Growing a sweet potato plant indoors is a fun and simple project that allows you to enjoy lush foliage and a vibrant decorative vine within your home. The process involves sprouting a sweet potato in water and providing the right conditions for its growth.

Introduction to Indoor Sweet Potato Cultivation

Transforming a common sweet potato into a thriving indoor plant is a rewarding experience, perfect for adding a touch of nature to any room. This guide focuses on cultivating the sweet potato primarily for its attractive foliage, often referred to as a sweet potato vine. It's an accessible project that requires minimal setup and consistent care.

Step-by-Step Guide to Growing Sweet Potato Vine Indoors

Successfully cultivating an indoor sweet potato vine is straightforward when you follow these key steps, ensuring your plant has the best start and sustained growth:

1. Selecting Your Sweet Potato

Begin by choosing an organic sweet potato. This is crucial because non-organic sweet potatoes are often treated with sprout inhibitors to extend shelf life, which will prevent them from growing. Look for a sweet potato that is firm, free from blemishes, and has no soft spots.

2. Setting Up for Sprouting

  • Prepare the Container: Select a clear glass jar, a wide-mouth glass bottle, or a similar container. Transparency is beneficial as it allows you to observe root development and monitor water quality.
  • Fill with Water: Fill a container with lukewarm water. Lukewarm water can help to gently awaken the potato and encourage the initial sprouting process.
  • Insert Toothpicks: Gather four toothpicks to insert into the sweet potato. These toothpicks will serve as a support structure. Insert them evenly around the sweet potato's midsection, pushing them in about halfway through its width. They should protrude enough to rest on the rim of your chosen container.
  • Position the Sweet Potato: Carefully set the sweet potato in the water so that the tip is submerged. Typically, the narrower, sometimes pointier end of the sweet potato is considered the "bottom" or root end, and this is the part that should be placed in the water. The toothpicks will suspend the sweet potato, keeping most of it above the waterline while the bottom remains submerged.

3. Optimal Growing Environment

  • Light and Warmth: Once set up, grow the sweet potato in a warm, sunny window. Sweet potatoes require ample bright light and warm temperatures to stimulate root growth and the emergence of shoots (slips). An ideal temperature range is between 65-80°F (18-27°C). Ensure it receives at least 6-8 hours of bright, indirect sunlight daily.

4. Maintaining Your Plant

  • Water Quality: It is essential to keep the water clean. Change the water every few days, or at minimum once a week, to prevent the build-up of algae, bacteria, and mold. Fresh water is vital for a healthy environment and prevents the potato from rotting.

5. Encouraging Growth

  • Provide Room: As your sweet potato begins to develop roots from the submerged end and leafy vines (slips) from the top, remember to allow room for growth. The roots will extend downwards, and the vines will grow upwards and outwards. Ensure your container is adequately sized to accommodate the initial root and vine expansion. As the vines grow, you may need to guide them or prune them to maintain your desired shape and size.

What to Expect and Next Steps

Within a few weeks of consistent care, you should observe roots emerging from the submerged tip and small green shoots, known as "slips," appearing from the top and sides of the sweet potato. These slips are the beginnings of your decorative sweet potato vine.

Once the slips are several inches long and have developed their own small roots (which may happen if they touch the water or once they are sufficiently mature), you have a couple of options:

  • Continue Growing in Water: You can allow the original sweet potato and its slips to continue growing in water indefinitely as a decorative plant. Simply prune the vines as needed to maintain its shape and size.
  • Plant Slips in Soil: For more vigorous growth or to start new, individual plants, carefully twist or cut off the slips from the main sweet potato. Each slip with roots can then be planted in a pot filled with well-draining potting mix, effectively creating a new sweet potato plant.

By following these simple steps, you can successfully cultivate a beautiful and easy-to-care-for sweet potato plant indoors, enhancing your living space with natural beauty.