Sweet Pea 'Mammoth Rose Pink' Seeds

If you want to grow flowers that look like they belong in a country show, 'Mammoth Rose Pink' is the variety for you. As the name suggests, this strain has been bred for size and vigour. It produces extra-long, sturdy stems topped with large, frilly blooms in a glowing, deep rose-pink.

While heritage varieties are grown for scent, 'Mammoth' varieties are grown for spectacle. They still possess a lovely, sweet fragrance, but their main purpose is to provide long, straight stems that are easy to arrange in vases, making them the number one choice for cut-flower enthusiasts.

Why Your Garden Needs 'Mammoth Rose Pink'

We love this plant for its "vase value." There is nothing more frustrating than trying to arrange short-stemmed flowers that fall out of the jar. 'Mammoth' produces stems often exceeding 12 inches, making it easy to create impressive, professional-looking bouquets.

The colour is also a standout. It isn't a shy, pale pink; it is a warm, vibrant, candy-rose shade that stands out clearly from across the garden, adding a burst of joyful energy to trellis and fences.

Understanding the Plant: What is a Hardy Annual?

Sweet Peas are **Hardy Annuals**.

They live for one season but can withstand cold weather during the seedling stage.
The Strategy: For the longest stems and earliest flowers, sow in Autumn (Oct/Nov) and overwinter in a cold frame. For an easier, low-stress display, sow in Spring (Jan-March).
Top Tip: Pinching is key! When seedlings have 3-4 pairs of leaves, pinch out the growing tip. This stops them getting "leggy" and encourages strong side shoots which produce better flowers.

Growing Guide: How to Sow and Grow

Sweet Peas are hungry plants that need rich soil to fuel their rapid growth.

🌱 Germination:
Sow indoors in Oct/Nov or Jan-March. You can soak seeds in tepid water overnight to speed up hydration. Sow 1cm deep in deep pots (root trainers or toilet roll tubes) to accommodate their long roots. Keep cool (approx 15°C). Germination takes 10-21 days.

Where to Sow:
They need **full sun** and deep, fertile soil. Dig a trench and fill it with well-rotted manure or garden compost before planting. Install tall supports (canes, netting, or a wigwam) immediately, as they climb fast.

Care While Growing:
Feed: Once buds appear, feed weekly with a high-potash fertiliser (tomato feed) to keep the blooms coming.
Water: Never let them dry out, or the buds will drop (bud blast).
Harvest: Pick flowers every single day. If seed pods form, the plant stops blooming.

Plant Specifications

Here is a quick reference guide to the key features.

My Recommended Garden Companions

The deep rose colour of 'Mammoth' looks stunning when paired with fresh greens and whites in a vase or on a trellis:

• 🍋 Larkspur 'Limelight Mix': A fresh contrast. The creamy-white and lime-green spikes of this Larkspur act as a zesty foil to the hot pink Sweet Peas. Grow them nearby for the perfect cutting patch combination.
• ❄️ Ammi Majus (Queen Anne's Lace): The essential filler. No Sweet Pea posy is complete without the airy white lace of Ammi Majus. Growing them together ensures you always have the foliage you need to show off the blooms.

📅 Sowing & Flowering Calendar

Sow in Autumn for early flowers, or Spring for summer blooms.

(↔️ Swipe chart to see all months)