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Shipping & Delivery
- All orders ship via USPS, First Class or Priority Mail.
- Dahlia tubers will start shipping in the first week of April, by plant hardiness zone.
- You can select a Local Pickup option during checkout.
- Please note that we do not ship Dahlia tubers or other products internationally.
If you are not ready yet to plant your Dahlias when you receive them, store them in a cool, dry and dark place until they can be planted. While in storage, prevent the tubers from touching each other for prolonged periods of time.
Planting Tips for Dahlia Mondriaan
Choosing a location
Dahlias will grow almost anywhere and are very forgiving, easy to grow garden plants. They will thrive in full sun but can tolerate some partial shade – the more sun, the bigger the flowers. Try to select a location that receives at least 6 hours of sun and is sheltered from the wind. Dahlias like to grow in well-drained and slightly acidic soil. If soil holds standing water for more than 24 hours after a heavy rain, it is normally a sign of poor drainage.
Dahlia Mondriaan can be planted safely after the last frost date. Watch the weather forecast closely to make sure conditions won’t be too cold or too wet. Plant your Dahlias outdoors when the air is consistently at least 50 degrees overnight. This generally means the soil in your garden is about that same temperature and that’s perfect.
Space your Mondrian tubers so they have enough room for air circulation. Allow 16″-20″ between bulbs to avoid overcrowding. For best performance, plant taller varieties behind the shorter varieties so the shorter ones don’t get shaded out by the taller stalks, causing them to produce fewer and smaller blooms.
In cooler climates, Mondrian Dahlias can be planted indoors, 4 to 6 weeks before the last frost date. Fill 1 or 2 gallon flowerpots or garden containers with slightly moist growing mix. Place the tuber(s) in the flowerpots or containers with the sprouts or eyes facing up, and cover with 2 inch of potting soil. Set the flower pots or containers in a warm place with good light and water sparingly.
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