
When do you plant your dahlias outside? … or maybe the more common question is – how early can I plant my dahlias?! A good question! The answer(s) depend mostly on where you live and when you expect your last frost. An easy rule of thumb to remember is to plant your dahlia tubers when the lilacs start blooming.

If your tubers are in cold storage, take them out to warm up and eye up just a couple weeks before your frost free date. This is not absolutely necessary, but if you have any “blind tubers” in your bins, then it’ll save you planting any duds.

If you are eager to get your beauties started earlier than your frost free date (perhaps you live in a really cold climate with a short growing season), you’ll need grow lights, grow room with lots of space, and a heated greenhouse would be excellent. If you have all these resources, then you can get started almost anytime. It is a fair bit of work, but its not work if you love it right?!

What if I plant my dahlia tubers out in the garden before my frost free date? If you’re a risk taker or maybe you like to push the boundaries or maybe there is another reason that you’d want to plant your dahlia tubers outside before your last frost free date (maybe you’ll be away during that peak planting period which is mid-May for us in Terrace). I have planted my dahlia tubers out in the garden in mid-April in Terrace, once because I was going to be away from the end of April until the first week of June – I came home to lovely dahlia plants happily growing. Another time I had all my dahlias started early and they had lovely green shoots with beautiful sets of leaves. I hardened them off outside for a few days and then planted them out – the very next morning we had our last frost of the year and as soon as the frost melted all my beautiful dahlia plants wilted from the nip of frost. Had I covered them with frost cloth, they may have been protected enough and carried on without any damage.

If you must plant your dahlias outside in the garden before your frost free date, here are a few things to consider.
- If the frost nips your dahlias new growth, all is not lost. If the tuber is in good shape it will push up new shoots. The frost kill will likely set back your dahlia’s growth by a couple weeks.
- If you plant dahlia tubers out early, know that they won’t do much growing until it warms up. Its kind of like putting them in cold storage out in the field – but where they are potentially subjected to additional abject conditions like risk of bugs/pests, rainy weather (a lot of rain and poor drainage can lead to rotting of tubers), frosts (kills off new growth and sets back new growth by a few weeks if your tuber doesn’t rot)

So what do we do at Medeek Meadows? We wait for the lilacs to bloom – mostly! We get our dahlias eyed up ahead of time by moving them out of cold storage as much as a month before our frost free date. Some varieties take longer than others to eye up. We check the weather, and look for signs of frost in the forecast – those mornings after a brilliant sunny day with clear skies at night are the ones to watch out for. Most of our dahlias are field grown. On our mission to get earlier blooms, we look for varieties that are earlier bloomers rather than getting them started early. Dahlias typically bloom from late June until frost. At Medeek Meadows Dahlia Farm in Terrace BC, we don’t expect or rely on June blooms. We usually start seeing dahlia blooms in our bouquets by mid-July. This is always weather dependent – and if we get a cool, wet summer our hopes for July blooms diminish… Dahlias are usually “full-on” in August and September. Dahlias like summers to be the same way we do – moderate warm temperatures, not too hot and not too cold with lots of sunshine.











