diff --git a/crates/openshell-cli/src/run.rs b/crates/openshell-cli/src/run.rs
index 12b891da1..9e62e6455 100644
--- a/crates/openshell-cli/src/run.rs
+++ b/crates/openshell-cli/src/run.rs
@@ -1993,7 +1993,7 @@ pub async fn sandbox_create(
     // Track whether we have seen a non-Ready phase during the watch.
     let mut saw_non_ready = SandboxPhase::try_from(sandbox.phase) != Ok(SandboxPhase::Ready);
     let start_time = Instant::now();
-    let provision_timeout = Duration::from_secs(120);
+    let provision_timeout = Duration::from_secs(300);
     // Track whether we saw the gateway become ready (from log messages).
     let mut saw_gateway_ready = false;
 
diff --git a/crates/openshell-server/src/sandbox/mod.rs b/crates/openshell-server/src/sandbox/mod.rs
index 2fd9b54b6..f8ab6a6dd 100644
--- a/crates/openshell-server/src/sandbox/mod.rs
+++ b/crates/openshell-server/src/sandbox/mod.rs
@@ -381,7 +381,7 @@ const RECONCILE_INTERVAL: Duration = Duration::from_secs(60);
 /// How long a sandbox can stay in `Provisioning` in the store without a
 /// corresponding Kubernetes resource before it is considered orphaned and
 /// removed.
-const ORPHAN_GRACE_PERIOD: Duration = Duration::from_secs(120);
+const ORPHAN_GRACE_PERIOD: Duration = Duration::from_secs(300);
 
 /// Periodically reconcile the store against Kubernetes to clean up orphaned
 /// sandbox records.  A record is orphaned when it exists in the store but
diff --git a/crates/openshell-tui/src/lib.rs b/crates/openshell-tui/src/lib.rs
index 9255ae0b2..98f4ed0d6 100644
--- a/crates/openshell-tui/src/lib.rs
+++ b/crates/openshell-tui/src/lib.rs
@@ -1256,7 +1256,7 @@ fn spawn_create_sandbox(app: &mut App, tx: mpsc::UnboundedSender<Event>) {
             let mut attempts = 0;
             let sandbox_id = loop {
                 attempts += 1;
-                if attempts > 60 {
+                if attempts > 150 {
                     let _ = tx.send(Event::CreateResult(Err(
                         "timed out waiting for sandbox to be ready".to_string(),
                     )));
diff --git a/e2e/rust/src/harness/sandbox.rs b/e2e/rust/src/harness/sandbox.rs
index da48c5ed2..7a942265d 100644
--- a/e2e/rust/src/harness/sandbox.rs
+++ b/e2e/rust/src/harness/sandbox.rs
@@ -25,7 +25,7 @@ fn extract_sandbox_name(output: &str) -> Option<String> {
 }
 
 /// Default timeout for waiting for a sandbox to become ready.
-const SANDBOX_READY_TIMEOUT: Duration = Duration::from_secs(120);
+const SANDBOX_READY_TIMEOUT: Duration = Duration::from_secs(300);
 
 /// RAII guard that deletes a sandbox on drop.
 ///
diff --git a/python/openshell/sandbox.py b/python/openshell/sandbox.py
index 6507c9a45..7b48ab3b9 100644
--- a/python/openshell/sandbox.py
+++ b/python/openshell/sandbox.py
@@ -248,7 +248,7 @@ class SandboxClient:
         raise SandboxError(f"sandbox {sandbox_name} was not deleted within timeout")
 
     def wait_ready(
-        self, sandbox_name: str, *, timeout_seconds: float = 120.0
+        self, sandbox_name: str, *, timeout_seconds: float = 300.0
     ) -> SandboxRef:
         deadline = time.time() + timeout_seconds
         while time.time() < deadline: