May Tips for nw gardeners



Now is a good time to add color by planting annual flowers in the garden and in containers. Try long-blooming flowers like geraniums, lobelia, bacopa, petunia, and begonia.

Need help creating your containers? We can offer advice and inspiration with #heyswansons. Use the hashtag to ask our advice on social media and we'll create a personalized Pinterest inspiration board like this one, only made just for you!

Want Swansons to design custom containers for your home or office? Check out our Container Design Department to learn what we can do!


Tomatoes and peppers have arrived! Did you know that determinate tomatoes ripen nearly all at once, while indeterminate tomatoes ripen a little at a time throughout the season? Some people prefer determinate tomatoes if they plan to harvest all at once and can, freeze or make sauce from their harvest.

Before planting in raised beds or the garden, mix some high-quality compost into your soil. You can also use compost as a mulch to help conserve water, suppress weeds, and insulate the soil. Learn more about soils and compost on our blog.

Keep basil inside on a sunny windowsill or in the greenhouse until night temperatures warm up to the 50's (Mid-May to June at the earliest).

Check our blog category Edible Gardening for helpful posts about all things edible.


In Spring, most houseplants begin to grow more actively. Start applying a fertilizer formulated specifically for indoor plants. Be sure to follow the directions on the product label for best results.

Did you keep a citrus plant indoors for the winter? Citrus benefits from an outdoor vacation in warmer weather but it is important to slowly acclimate your plant to outdoor conditions! Start by putting the plant out in the shade during the day and bringing it in at night. Then slowly increase the amount of time it is outside while also allowing it to gradually get more and more direct sun until it is full sun. This process can take up to a week or more. 

Love your houseplants? So do we! We'd love to see pics. Share the love on our Facebook wall, or on Twitter and Instagram with #heyswansons!


Deal with those dandelions now, before they spread their seeds! Spot spray or pull them, and be sure to remove as much of the taproot as possible.

You can aerate, topdress, and overseed your lawn through the month of June. Remember to keep it well watered during these activities! 

The height of the grass generally equals the depth of the roots, so keeping grass a little longer helps build a strong support system. Mow on a medium setting, cutting off no more than 30% at a time. 


Plant Care Library

At Swansons, we’re dedicated to growing the smartest, hippest, and healthiest gardeners in the Pacific Northwest. Below is a library filled with pages on what we grow in Seattle. Just remember, we were all novices once, and no one knows it all. So enjoy, keep learning, and happy gardening!

Looking for more Pacific Northwest gardening resources? Here is a list of our community partners.