Yes, October is a great month for planting tulips in pots. Fall is exactly when these bulbs want to go into the soil, so you are right on time. The trick is what you do with the pot after that, not the planting date itself.
Picture two pots of the same bulbs. One sits on a warm porch all winter and sends up a few sad, stubby leaves with no flower at all. The other gets a real cold spell and bursts into bloom right on cue in spring. The bulbs were fine in both of your pots. The cold was the only thing that changed.
That difference is the whole point of your work here. Tulip bulbs need a long, steady chill to flower, and this is true for tulip bulbs in containers just as it is for ones in the garden bed. The cold is the signal that tells the bulb winter has passed and it is safe to push out a stem. Give your bulbs that signal and they will reward you.
Inside each bulb sits a tiny flower, already formed and waiting for you. The bulb keeps it locked up until it has counted enough cold hours. This potted tulips cold period runs about 12 to 16 weeks at 35°F to 48°F (2°C to 9°C). Skip the chill and the bulb stays asleep, so you get leaves but no bloom for your effort.
A pot changes the math for you in one big way. In the ground, soil wraps the bulb and holds heat, so deep frost takes a while to reach it. Your container sits up in the open air with cold hitting it from every side. That extra exposure is good for the chill, but it also means the roots can freeze solid in a hard winter. A frozen root ball kills the bulb, so you have to guard against it.
So your job is simple. Give the bulbs cold, but never let them freeze into a brick of ice. Start with the right potting mix, then pick one of three ways to shelter the pot through the worst weeks.
Use a loose, well-drained potting mix, not heavy garden dirt that packs down and holds water. Wet bulbs rot fast in the cold. Set each bulb pointy end up, cover it with a few inches of mix, and water it once so the soil settles around the roots.
Now shelter the pot for the cold weeks. The first option is to sink the whole pot into a garden bed, where the surrounding soil buffers the worst frost. The second is to pile thick mulch or leaves over and around the pot to wrap it in a warm blanket. The third is to move it into an unheated garage, shed, or cold frame that stays chilly but never bone-freezing.
Whichever way you go, keep the soil barely damp through winter. Check it every few weeks. Bone-dry mix can dry the roots out, and soaking-wet mix invites rot, so aim for the middle. The bulbs are not thirsty while they sleep, but they should not be dust either.
Once the cold weeks are behind you and you see green tips poking up, move your pot back into the light and warmth. From there the bulbs run on their own clock and you can sit back. Pot them this October, give your bulbs their chill, and you will have a container of bright tulips waiting for you in spring.
Read the full article: Tulip Bulbs: The Complete Planting Guide
