Can I Plant Sweet Peas In July

Can I Plant Sweet Peas In July?

Want to sow some sweet peas but have forgotten to do so, thinking of planting them now in July? let’s have a look and find out if you can plant sweet peas in July.

Can I Plant Sweet Peas In July
Can I Plant Sweet Peas In July

Can I Plant Sweet Peas In July?

You can plant sweet peas in a few months though, around September and October. These sweet peas can then be overwintered in a greenhouse or polytunnel.

They will then be at a really advanced stage come spring and will give you a much earlier flowering than spring-sown sweet peas.

Sow them in root trainers if possible, this will allow them to develop a really strong root and will also make transplanting them in spring much easier.

Sow and grow your autumn sweet peas in a greenhouse, you don’t want to grow them indoors as the conditions will be too good and your sweet peas will probably just grow really leggy.

A greenhouse is perfect as it will protect the sweet peas from the worst of the weather but will also be cold enough to stunt their growth.

You can then plant them out in spring once the worst of the frosts have passed. Sweet peas are fairly tough plants and can tolerate a little frost but not a really heavy frost.

Mixed colours of sweet pea flowers
Mixed colours of sweet pea flowers


sweet peas, (Lathyrus odoratus) are a flowering plant belonging to the legume family. They are an annual flower that loves to climb and spread, in the right conditions and with the correct support they can grow to 2 and a half meters tall!

Unlike many other legumes which are grown to be eaten, sweet peas are grown for purely aesthetic reasons. There is evidence to suggest that the pea seeds from a sweet pea plant are actually toxic to humans and not fit for consumption even if this was desired.

Sweetpea FAQ’s

Are sweet peas perennial?

No sweet peas are an annual plant, they will not come back year after year.

Can you eat sweetpeas?

No, sweet peas are grown purely for their looks. Unlike many other legumes, they are actually toxic to humans if consumed.

Are sweet peas poisonous to pets?

Yes, as they are poisonous to humans they are also poisonous to pets, so make sure you keep an eye on your pets when they are hovering around sweet peas.

How high can sweet peas grow?

With the proper support, sweet peas can grow to 2m or even slightly above!

When do you grow sweet peas?

The traditional season for sweet peas is June and July but with the right care and attention, they can be both started earlier and grown later into the season. Regular deadheading of sweetpeas can massively prolong their flowering period.

How to germinate sweet peas?

I like to soak my sweet pea seeds in water for 24 hours before planting them in a seed tray. This soaking helps to break down the tough shell around the seed allowing them to germinate better.