0How it thrives
Watermedium
Lightfull sun
Humiditymedium
Min. temperature12 °CJanuary
Only very rarely, a little water so the roots don’t dry out completely.
No feeding now.
Cool and bright, 12–19 °C: unheated room, stairwell, cold windowsill or frost-free greenhouse.
Spider mites love dry heated air – check the undersides of the leaves.
February
Only very rarely, a little water so the roots don’t dry out completely.
No feeding now.
Cool and bright, 12–19 °C: unheated room, stairwell, cold windowsill or frost-free greenhouse.
Spider mites love dry heated air – check the undersides of the leaves.
March
Gentle start: the first small drink once you see buds or new growth and it warms up.
First weak dose at the end of the month if it is actively growing.
The sunniest window (south or west).
Move it somewhere brighter and warmer and end wintering. Get it used to strong sun gradually.
If roots fill the pot: fresh soil, a pot 1–2 cm larger. Water sparingly for a week afterwards.
April
When the top 2–3 cm of soil are dry.
Liquid feed every 2–3 weeks.
The sunniest window (south or west).
If roots fill the pot: fresh soil, a pot 1–2 cm larger. Water sparingly for a week afterwards.
May
When the top 2–3 cm of soil are dry.
Liquid feed every 2–3 weeks.
Best outdoors: sunny balcony, terrace or garden – acclimatise it to full sun gradually.
After mid-May (last frosts) it can go outside – keep it in partial shade for the first 1–2 weeks to avoid sunburn.
It flowers next month – once you see buds, don’t move it any more.
June
When the top 2–3 cm of soil are dry – more often in heatwaves, preferably in the evening.
Liquid feed every 2–3 weeks.
Best outdoors: sunny balcony, terrace or garden – acclimatise it to full sun gradually.
It usually flowers now – don’t turn or move it, and log the bloom in your diary!
Above 35 °C, shade it at midday to prevent sunburn.
July
When the top 2–3 cm of soil are dry – more often in heatwaves, preferably in the evening.
Liquid feed every 2–3 weeks.
Best outdoors: sunny balcony, terrace or garden – acclimatise it to full sun gradually.
It usually flowers now – don’t turn or move it, and log the bloom in your diary!
Above 35 °C, shade it at midday to prevent sunburn.
August
When the top 2–3 cm of soil are dry – more often in heatwaves, preferably in the evening.
Liquid feed every 2–3 weeks.
Best outdoors: sunny balcony, terrace or garden – acclimatise it to full sun gradually.
It usually flowers now – don’t turn or move it, and log the bloom in your diary!
Above 35 °C, shade it at midday to prevent sunburn.
September
When the top 2–3 cm of soil are dry.
No feeding now.
Best outdoors: sunny balcony, terrace or garden – acclimatise it to full sun gradually.
Bring it in when nights drop below 17 °C. Check for pests first.
It usually flowers now – don’t turn or move it, and log the bloom in your diary!
October
Taper off gradually: very little by the end of the month.
No feeding now.
The sunniest window (south or west).
Move it to its cool, bright winter spot and taper off watering. Log it with one click in the Care hub.
Keep it away from radiators; watch for spider mites in the dry air.
November · now
Only very rarely, a little water so the roots don’t dry out completely.
No feeding now.
Cool and bright, 12–19 °C: unheated room, stairwell, cold windowsill or frost-free greenhouse.
December
Only very rarely, a little water so the roots don’t dry out completely.
No feeding now.
Cool and bright, 12–19 °C: unheated room, stairwell, cold windowsill or frost-free greenhouse.
Spider mites love dry heated air – check the undersides of the leaves.
Prune hard in spring – it flowers only on new growth.
Ripe fruit is edible; unripe fruit and leaves may contain cyanogenic glycosides.
Giant granadilla – what to know
Giant granadilla (Passiflora quadrangularis) belongs to the Passifloraceae family (genus Passiflora) and is listed in our catalog under “Garden flower”. Its needs – light: full sun; water: medium; humidity: medium. Keep it above 12 °C – it is frost-tender and needs a frost-free spot in winter. Rest period: cold winter dormancy. Typical flowering time: June, July, August, September. Easy enough for beginners. There is no reliable data on its effect on cats and dogs. Nobody on Perfect Plants Club has added it to their collection yet – be the first!
All Passiflora species in the catalog →Detailed toxicity data →
Frequently asked questions
How often should I water Giant granadilla?
Moderately: water when the top 2–3 cm of soil is dry, and never let it sit in standing water.
How much light does Giant granadilla need?
It needs plenty of direct sun – the sunniest window, or outdoors in summer, suits it best.
How cold can Giant granadilla get?
Keep it above 12 °C – it is frost-tender and needs a frost-free spot in winter.
Is Giant granadilla toxic to cats and dogs?
There is no reliable data on its effect on cats and dogs.
When does Giant granadilla flower?
Typical flowering time: June, July, August, September.
What members’ data shows
When does it really bloom?
No blooms logged yet. If yours flowers, your data will be the first!
Average watering interval
Not enough watering logs yet. Waterings logged in the care hub feed this chart.
Tips and questions about this species
Passiflora
Care data is for guidance only.
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