How to grow and care for Buddleja davidii 'Black Knight'
plant care guide about watering, fertilizing, trimming, repotting, cutting, propagating Buddleja davidii 'Black Knight', Orange-eye butterfly bush 'Black Knight', Swallowtail butterfly 'Black Knight'
Buddleja davidii 'Black Knight' 101 - Plant Care Instructions
Bright direct light
16C° ~24C°
Every 7 days
Growth Observation wiki
transplant
water
How to water Buddleja davidii 'Black Knight'
How often should I water?
check Buddleja davidii 'Black Knight' Every 7 days if it needs water when it’s very cold (below 5℃), water less frequently
When do I need to water?
the top 2-3 inches of soil is dry
Light & Location
How much light does a Buddleja davidii 'Black Knight' need?
Bright direct light
Bright indirect light
Grow light
Light preference
Buddleja davidii 'Black Knight' likes Bright direct light, Bright indirect light, Grow light day. The brighter the space, the better this plant grows.
Check if there’s an optimal place in your house!
This plant prefers
2K ~ 20K lux to thrive!
0
20K~
2K
20K
Temperature
Natural habitat
-15
-12~35℃
45
Houseplants
-15
16~24℃
45
Plants that grow in the wild and those that grow indoors prefer different temperatures. If you grow Buddleja davidii 'Black Knight' at home, make sure the temperature is 16~24℃.
Humidity
Ideal humidity
0
40~70%
100
Buddleja davidii 'Black Knight' prefers humidity about 40~70%. If necessary, increase humidity by misting, humidifier.
Fertilize
Collective Knowhow
When should I fertilize?
Only when your plant is healthy
How frequently should I fertilize?
1-2 times in growing season. A pinch for a small pot.
Characteristic
| Characteristic Name | Characteristic Value |
|---|---|
| Lifespan | Perennial |
| Hardiness Zone | 6 - 9 |
Is your plant sick?
Track what happened. We’ll let you know the cause and treatment shortly!
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