The botanical kitchen · 6 min read
சங்குப்பூ தேநீர்
Sangu Poo Tea: How to Brew It, with Lemon and Karuppatti
From a familiar Tamil flower to a naturally blue cup: discover what makes Sangu Poo special, how to brew it, and how to enjoy it with lemon or karuppatti.
By THENVANAM Editorial ·
4–5 dried flowers
For one cup
3–5 minutes
Steeping time
Warm or over ice
Make it your way
A familiar flower, a different kind of tea
You may know it as sangu poo, kakkattan, butterfly pea or Clitoria ternatea. The name sangu poo — conch flower — comes from the shape of the bloom. In Tamil homes it is brewed into a simple tea finished with lemon and karuppatti, and that is the cup this guide builds up to. The dried blue flowers make an infusion that looks striking but needs very little preparation.
This is a flower infusion rather than a tea-leaf brew. Try the first cup plain, then decide whether you prefer a squeeze of lemon, a little karuppatti or a glass filled with ice.
Sangu poo tea benefits: what we can say
What a cup offers is practical. It is caffeine-free, because there is no tea leaf in it. The flavour is mild enough to drink plain or sweetened. And the blue is the flower’s own colour, which shifts toward purple or pink when lemon goes in. Sweetener is optional, so a plain cup has no added sugar.
In Siddha tradition, the flower, leaf and root of the plant are described in medicinal terms, and those uses are repeated widely online. They are not established by clinical evidence, and THENVANAM makes no health claims for this tea. Enjoy it as a drink, not as a substitute for medical care.
Some home recipes boil the flowers for several minutes rather than steeping them. This guide follows the product guidance — 4–5 flowers steeped in hot water for 3–5 minutes — which is enough to draw out a deep blue.
Your first cup
How to make Sangu Poo tea
To make sangu poo tea: steep 4–5 dried butterfly pea flowers in a cup of hot water for 3–5 minutes, then lift out or strain the flowers. Add a few drops of lemon after steeping if you want to see the colour shift from blue toward purple or pink. Sweeten to taste if you like.
What you need
- 4–5 dried, food-grade butterfly pea flowers
- 1 cup of hot water (about 200–250 ml)
- A cup or small teapot and a fine strainer
- Optional: a few drops of lemon and your preferred sweetener
Heat the water
Bring water to the boil and let it settle for a moment. Hot water draws the colour out quickly; lukewarm water gives a pale cup.
Count out the flowers
Take 4–5 dried flowers from the pack with dry fingers or a dry spoon and put them in a cup or small teapot. Close the pack straight away.
Pour and steep
Pour a cup of the hot water over the flowers and leave them for 3–5 minutes. The water usually turns blue within the first minute and deepens the longer it steeps.
Remove the flowers
Lift the flowers out with a spoon or pour the tea through a small strainer. The spent petals turn pale and translucent once they have given up their colour.
Add lemon, if you like
Stir in a few drops of lemon juice after steeping and watch the blue shift toward purple or pink. Add it drop by drop — a little changes the colour; more mainly changes the taste.
Sweeten and serve
The flavour is mild, so sweeten to taste with honey, sugar or a little dissolved karuppatti (palm jaggery) if you want to. Drink it warm, or let it cool for an iced version.
One brew, three ways to enjoy it
Keep it blue
Strain and sip warm. Start without sweetener so you can get to know the mild flower flavour.
Lemon & karuppatti
Dissolve a little karuppatti in the warm tea, then add lemon drop by drop. Taste as you go. The sweetness is optional; lemon shifts the blue toward purple or pink.
Pour it over ice
Brew as usual, let it cool and pour over ice. Sweeten while warm if you like, so the sweetener dissolves easily.
From reading to brewing
Choose flowers meant for your cup
Look for dried butterfly pea flowers labelled for food or beverage use. Check the ingredient list, pack size and storage directions before you buy.
- For a single-flower brew, choose an ingredient list that names only butterfly pea flowers.
- Whole flowers are easy to count for the 4–5-flower starting brew.
- Keep dried flowers sealed, away from moisture, and use a dry spoon.
Start with THENVANAM Sangu Poo · 50 g
100% Sangu poo / butterfly pea flowers (Clitoria ternatea), whole and dried.
Getting a deeper colour
There is no fixed correct strength — the depth of blue is a matter of preference. Three things control it: how many flowers go in, how hot the water is and how long they steep. Change one at a time so you can tell which made the difference.
- Pale cup: use all five flowers, make sure the water is properly hot, and steep towards the full 5 minutes.
- Turned purple before any lemon went in: something acidic was already in the cup — rinse it well and try again.
- Bits in the cup: the flowers were crushed. Use whole flowers from the top of the pack and strain the tea.
- Second steep: the same flowers give a paler, still-blue cup. Use fresh flowers for a full colour.
When to add the lemon
Always after steeping, not before. The colour change is the point of adding it, and it is easier to see — and to judge how much you want — when you start from a clear blue cup. Serving it in a glass makes the shift easier to watch.
For a chilled, sweetened version made in a larger batch, see the sangu poo lemon cooler.
Before you add it to your routine
Sangu poo is a tisane — an infusion of a flower rather than tea leaf — and one of three THENVANAM botanicals described for food and drink, alongside moringa and amla. If you are pregnant, breastfeeding, taking medication or managing a health condition, ask a qualified professional before adding a new ingredient to your diet.
The blue is a natural plant pigment and can mark pale cloth or a light-coloured cup left to stand, so rinse cups and strainers soon after use.
Frequently asked questions
What are the benefits of Sangu Poo tea?
THENVANAM makes no health claims for sangu poo tea. What it offers is practical: it is caffeine-free, mild in flavour and naturally blue, and it can be made warm or iced, with or without sweetener. Siddha tradition describes medicinal uses for the plant, but these are not established by clinical evidence. If you are pregnant, breastfeeding, taking medication or managing a health condition, ask a qualified professional before adding a new ingredient to your diet.
Can I add karuppatti to Sangu Poo tea?
Yes. Dissolve a little karuppatti (palm jaggery) in the warm, strained tea, then add lemon gradually and taste. Karuppatti adds sweetness and may change the appearance of the blue brew; it is still added sugar.
How many flowers do I need per cup?
4–5 dried flowers for a cup of hot water, as the product guidance says. Use the upper end for a deeper blue.
How long should I steep sangu poo?
3–5 minutes. The colour appears quickly and deepens the longer it steeps.
Why did my tea turn purple?
Acid shifts the blue toward purple or pink. If you added lemon, that is the expected colour change; if you did not, something acidic was probably already in the cup.
Can I make it iced?
Yes. Steep the flowers in hot water as usual, let the tea cool, then pour it over ice. The sangu poo lemon cooler sets out a sweetened, chilled version.
Can I reuse the flowers?
A second steep gives a paler, still-blue cup. For a full colour, use fresh flowers.
Does sangu poo tea contain caffeine?
No. It contains no Camellia sinensis tea leaf, and so no caffeine — it is a tisane, an infusion of the dried flower alone.
What this page is based on
THENVANAM product specification — THENVANAM Sourcing
Composition, net quantity, SKU and usage guidance are taken from the current product specification for each pack.
Botanical nomenclature and regional plant names — THENVANAM Editorial
Botanical names are given in the accepted binomial form; Tamil and other regional names are recorded as they are used in South Indian households.
Documented South Indian household practice — THENVANAM Editorial
Descriptions of traditional use record how an ingredient has customarily been prepared and used. They are not statements of clinical effect and should not be read as health advice.
Bring a little blue to your next tea break.
Whole dried Sangu Poo flowers, ready for your kettle.
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