General solution of an ordinary differential equation of constant matrix

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Find the general solution of $$y'=Ay,$$ where $A$ is the constant matrix

$$A=\begin{bmatrix}5&2&-3\\4&5&-4\\6&4&-4\end{bmatrix}$$

So, after determining the eigenvalues to be $\lambda=1,2,3$, I was able to find the corresponding eigenvectors for each eigenvalue to be

$$u=\begin{bmatrix}.5\\.5\\1\end{bmatrix}$$ $$v=\begin{bmatrix}1\\0\\1\end{bmatrix}$$ $$w=\begin{bmatrix}.5\\1\\1\end{bmatrix}$$

then would the general solution be

$$y(t) = C_1e^tu + C_2e^{2t}v + C_3e^{3t}w$$

where $u,v$,and $w$ are the eigenvectors defined previously?

Since there is no initial condition given then the $3$ constants cannot be determined, correct? Thus, we leave them as they are?