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Harlequins Gardens

Harlequins Gardens

Boulder's specialist in well-adapted plants

We’re Open Tues–Sun, 9-5, through October!

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Home | Plants | May To-Do List

May To-Do List

May 5, 2026

TREES & SHRUBS: To avoid breakage from heavy snow, periodically put on your boots, heavy coat, and a hat with a brim, and gently shake snow off trees and shrubs that are already in leaf.

ROSES:
If you have not already pruned them, now is the time to remove canes that are dead,
damaged, crossing and rubbing, or growing out of bounds. Make clean cuts with a good, sharp
pair of clippers. Avoid cutting back roses that only bloom in spring until after they’ve bloomed.

Fertilize roses with OMRI-certified Down to Earth Rose & Flower Mix, scratching 1 cup into the soil, 1-2” deep in a ring under the ‘dripline’ of the bush. Cover with mulch and water it in well.

PERENNIALS: It’s Prime-Time for planting!

TOMATOES: Set up Solar Caps over the spots where you’ll be planting tomatoes. Let the Solar Caps insulate and warm up the soil for about a week prior to planting. Then you can carefully lift the Solar Cap and place it to the side while you add fertilizer to the planting hole, plant your
tomato start, and then replace the Solar Cap over it.

SPRING VEGETABLES: Starts for spring greens can be transplanted any time this month. It’s a little late now for spinach and arugula, unless you garden in the mountains. Sow seeds directly in the garden now for carrots, lettuce, cilantro, scallions, snow peas, snap peas, beets, turnips, radishes, Swiss chard, kale,and radicchio, as well as annual flowers such as Cosmos, Sweet Alyssum, Nasturtium, Poppy and Marigold. Wait for warmer weather and soils late in the month to sow beans, corn, squash, cucumber, Zinnia, Four O’clock, and Sunflower.

Tags: may to do list, spring planting, cool weather veggies, sustainable gardening Categories: Plants, Blog, OLD-Blog

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Sign-up for our weekly e-newsletters to receive empowering gardening tips, ecological insights, and to keep up on happenings at Harlequin’s Gardens — such as flash sales and “just in” plants. We never share customer’s addresses!

We do not ship plants!

Our plants are for sale ONLY at our Boulder location. We DO NOT ship plants or any other products.  Come visit us!

Hours by Season

MARCH HOURS
Thursday-Sunday, 9AM-5PM

STARTING APRIL 1
Tuesday-Sunday, 9AM-5PM

 

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Contact Us

303-939-9403 (Retail)
staff@harlequinsgardens.com

4795 North 26th St
Boulder, CO 80301

Sign-up for E-Newsletters!

Sign-up for our weekly e-newsletters to receive empowering gardening tips, ecological insights, and to keep up on happenings at Harlequin’s Gardens — such as flash sales and “just in” plants. We never share customer’s addresses!

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Our Hours

JANUARY-FEBRUARY HOURS:
Thursday-Saturday, 10AM-4PM

MARCH HOURS:
Thursday-Sunday, 9AM-5PM

APRIL-OCTOBER HOURS:
Tuesday-Sunday, 9AM-5PM
Closing end of Oct.

Mondays, CLOSED

The plants we grow are organically grown. All the plants we sell are free of bee-killing neonicotinoid pesticides.