For the best results, sweet peas can be planted at specific times of the year, both indoors and directly outside.
Sweet peas offer a delightful fragrance and vibrant colour to gardens. Knowing the optimal time to get them started is key to a successful display. Based on horticultural advice, there are primary windows for planting sweet peas, depending on whether you sow seeds or plant out seedlings.
Key Sweet Pea Planting Timings
The timing for planting sweet peas depends on your method: starting seeds indoors or sowing them directly into the ground. You also need to consider when to plant out seedlings started indoors.
Sowing Sweet Peas
You have two main options for starting sweet pea seeds:
- Sowing Indoors: For an early start and often the best results, sow sweet pea seeds indoors. Aim for late October/November or late February/March. Avoid sowing in midwinter (like December or January) as temperatures and light levels are less than ideal during this period, which can hinder germination and early growth.
- Sowing Direct Outdoors: If you prefer to sow seeds directly into the garden soil, wait until the weather is milder. You can sow sweet pea seeds direct into the ground in April or May.
Planting Out Sweet Pea Seedlings
If you started your sweet peas indoors during the autumn or late winter, they will need to be moved to their final position outdoors. Plant out your sweet pea seedlings and plants during a mild spell between March and May. This allows them to establish themselves as the weather warms up but before it gets too hot.
Sweet Pea Planting Calendar Summary
Here's a quick overview of the sweet pea planting schedule:
| Method | Optimal Timing |
|---|---|
| Sowing Indoors (Best Results) | Late October/November |
| Sowing Indoors (Best Results) | Late February/March |
| Sowing Direct Outdoors | April or May |
| Planting Out Seedlings | Mild spell between March & May |
Choosing the right time ensures your sweet pea plants develop robust root systems and are ready to climb and bloom when the season arrives.
