When is the Lagna lord weak in a horoscope?

The Lagna lord is the planet that controls the 1st House (the ascendant or Lagna)

The Lagna decides

• Physical stature of the person
• Mindset of the person

So, you can see that the Lagna and its lord plays an important role in the development of the individual.

Considering this, we need see where does it get weak in the horoscope

1. When Lagna Lord is placed in the Dusthana Houses (House 6, 8 and 12)
2. When Lagna Lord is placed in inimical sign (Like Leo Lagna Lord Sun in Saturn’s Zodiac like Capricorn or Aquarius etc.)
3. When Lagna Lord is placed in conjunction with Rahu or Ketu
4. When Lagna Lord is aspected by Rahu or Ketu
5. When Lagna Lord is placed in the house of Debilitation (like Pisces Lagna Lord Jupiter in the Capricorn Zodiac where it is debilitated)
6. When Lagna Lord is combust due to the proximity to the Sun (like Libra Lagna Lord Venus is placed within 10 degrees of the Sun)

Hope this gives you an idea

All the best

God Bless!