
When a cluster of three or more planets converge in Sagittarius (or any other sign and/or house) in your birth chart, you have a stellium. Stellium in Sagittarius in someone's chart indicates an abundance of Sagittarius energy; the more planets that converge there, the stronger the Sagittarius energy that person exhibits.
Stellium in Sagittarius
In a natal chart, a stellium can occur in any sign and in any house. When there's a stellium in Sagittarius, it suggests that you have plenty of Sagittarius energy available to you, even when Sagittarius isn't your Sun, Moon, or ascendant. Sagittarius energy is optimistic, exploratory, and lucky. The stellium in Sagittarius serves as an amplifier of these Sagittarius traits so even if your sun sign is something other than Sagittarius, it's likely you display plenty of Sagittarius traits as well.
General Traits Associated With Stellium in Sagittarius
If someone has only a single planet in Sagittarius (particularly Sun or Moon), then they will likely display, to some extent, the typical personality traits of a Sagittarius; however, other influences in their chart, such as the placement of other planets and the rising sign, may have a tempering effect on these traits. However, when one has a stellium in Sagittairus (particularly if it includes Sun or Moon), then they may fit all of the Sagittarius personality descriptions to a T. In other words, they may appear to be the most Sagittarius person to ever walk the Earth. Traits that come to the forefront with a stellium in Sagittarius include:
- optimistic
- blunt
- enthusiastic
- has a case of wanderlust
- fun-loving
- commitment phobic
- cheerful
- funny
- restless
- flirty
Someone with a stellium in Sagittarius will display these traits to a much more intense degree than someone with only one or two planets in Sagittarius. For example, someone with a stellium in Sagittairus may be bitten so hard by the travel bug they never stay in one place for long, or they prioritize travel and adventure above all else. On the other hand, someone with only their Sun in Sagittarius my like travel but still be somewhat of a homebody depending on where their other planetary influences lie. Likewise, a person with stellium in Sagittarius may put her foot in her mouth several times a day while someone with only a Sagittarius ascendant may have a propensity to bluntness that is less extreme.

Stellium in Sagittarius in Different Houses
It's possible to have a stellium in Sagittarius and in one of your astrological houses depending on how the planets are positioned in your natal chart. If the stellium in Sagittarius is also in one of your astrological houses, it will enhance the energy of that house as well.
How Planets Affect a Sagittarius Stellium
Depending on the planets that make up the stellium in Sagittarius, the exaggeration of certain Sagittarian traits may be greater or less.
Personal Planets
For example, if the stellium contains personal planets (Sun, Moon, Mercury, Mars, and Venus), then Sagittarius personality traits, such as optimism and restlessness, are likely to be even more exaggerated.

Social Planets
When the stellium contains social planets (Jupiter and Saturn), then you may be more likely to display an exaggeration of Sagittarius's social and communication traits, such as bluntness or being flirty.

Transpersonal Planets
Transpersonal planets (Uranus, Neptune, and Pluto) may also appear in a stellium. These planets affect how you grow, change, and transform, so their presence in a stellium in Sagittarius will show exaggerated Sagittarius propensities for transformation such as growth and change arising from travel and multicultural experiences or a tendency for deep spirituality.
Super Sagittarius Stelliums
A stellium in Sagittarius essentially results in a "super Sagittarius", or someone who has exaggerated or strong Sagittarian traits. In these people, the Sagittarius energy will be strong and provide both challenges and advantages associated with the Sagittarius characteristics.