Sweet Pea Knee High

$4.49

Lathyrus Odoratus

  • Seed Count 10
  • Self Supporting
  • Annual
  • 80 cm

In stock

Description

A compact old-fashioned semi-dwarf Sweet Pea Knee High is a small to medium-sized plant with more height than the dwarf types, but shorter than the traditional vine varieties.

It is a self-supporting Sweet Pea that comes in a wide range of vivid colours including lavender, pink, purple, red, salmon & white flowers.

Grows well in large containers and works well in knee-high borders, cottage gardens and large containers. Popular long-lasting cut flowers for formal arrangements or vases.

Traditionally the 17th of March, St Patrick’s Day, is the date used as a guide for sowing sweet peas in many parts of Australia.

Find your Climate Zone

Method: Sow direct
Soil Temp: 8°C - 24°C
Cool Mountain: Aug - Oct
Position: Full sun
Arid: Apr - Aug
Row Spacing: 8 cm apart
Temperate: Apr - Sep
Planting Depth: 12 mm
Sub Tropical: Apr - Jul
Harvest: 100 days

Tropical: Apr - MayPlant Height: 100 cm

Site Selection and Soil Preparation

 Sunlight:

  • Sweet peas need at least 6 hours of sunlight daily. In hotter regions, provide afternoon shade to protect them from scorching.

 Soil:

  • They prefer well-draining, fertile soil with a slightly alkaline pH (6.5–7.5). Enrich the soil with compost or well-rotted manure before planting.

 Drainage:

  • Ensure the soil is not waterlogged, as sweet peas dislike wet feet.

How to Plant Sweet Peas

Seeds:

  • Soak seeds in water for 24 hours before planting to improve germination.
  • Sow seeds directly into the garden or start them in seed trays.
  • Plant seeds 12 mm deep, spacing them 8 cm apart.
  • If using seed trays, transplant seedlings when they are 5–7 cm tall.

Support:

Bush varieties:

  • Small 1 m canes can be used to provide support, or they can be allowed to tumble for a softer effect.

 Climbing varieties:

  • Trellising needs to be set up for support

Watering and Feeding

 Watering:

  • Keep the soil consistently moist but not waterlogged.
  • Water deeply once or twice a week, depending on rainfall and temperature.

 Feeding:

  • Sweet peas are heavy feeders.
  • Apply a balanced liquid fertiliser every 2–3 weeks during the growing season.
  • Alternatively, use a slow-release fertiliser at planting time.

Mulching and Weeding

  • Apply a layer of mulch (e.g., straw or sugar cane mulch) around the plants to retain moisture and suppress weeds.
  • Keep the area weed free to reduce competition for nutrients.

Pest and Disease Management

Sweet peas are relatively pest resistant but can be affected by:

 Aphids:

  • Spray with a mild soap solution or use neem oil.

 Powdery Mildew:

  • Ensure good air circulation and avoid overhead watering. Treat with a fungicide if necessary.

 Snails and Slugs:

  • Use organic bait or traps to protect young plants.

Pruning and Deadheading

 Pinching:

  • Pinch out the growing tip when seedlings are 10–15 cm tall to encourage bushier growth.

 Deadheading:

  • Remove spent flowers regularly to promote continuous blooming.

 Cutting Flowers:

  • Harvest flowers frequently for bouquets to encourage more blooms.

Saving Seeds

  • Allow some pods to mature and dry on the plant.
  • Harvest the pods when they turn brown and brittle.
  • Remove the seeds and store them in a cool, dry place for planting next season.

Common Problems and Solutions

 Poor Germination:

  • Ensure seeds are soaked before planting and soil is kept moist.

 Yellowing Leaves:

  • Often a sign of overwatering or nutrient deficiency.
  • Check drainage and fertilise if needed.

 Lack of Flowers:

  • This can be due to insufficient sunlight, poor soil fertility, or excessive nitrogen.
  • Address these issues to encourage blooming.

Sweet Peas in Pots

  • Sweet peas can be grown in pots if space is limited:
  • Choose a deep pot (at least 30 cm deep) with good drainage.
  • Use a high-quality potting mix enriched with compost.
  • Provide a trellis or support for climbing.
  • Water and feed regularly, as potted plants dry out faster.
  • Companion Planting

Sweet peas grow well with:

 Roses:

  • Their climbing habit complements rose bushes.

 Lettuce and Spinach:

  • Sweet peas provide shade for these cool season crops.

Avoid planting with:

  • Onions or garlic, as they can inhibit growth.

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