COVID-19 RESPONSE: New Castle Gardens is open Mon – Fri 9-5 and Sat & Sun 10-3

We are doing zero contact sales. Masks are required. 6-10 foot social distancing. 4 people in the store/greenhouse at a time.

Gardening Supplies

Soils & Amendments

Online Gardening Classes

Thank You for Choosing Us as Locals’ Choice Best Garden Center / Nursery 3 Years in a Row!


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Plant Sale

50% Off All Produce

We are so excited about the upsurge in people growing their own food. We are still early enough in the planting season to get plants in the ground. To celebrate all of you home gardeners, we are giving you an unbelievable deal.

50% Off All Veggies

June Sale
15% Off All Plants

New Store Inventory

All Items Made by Local Artisans

June Gardening

June Garden Calendar


  • Water in late evening to early morning, between 8 p.m. and 8 a.m.
  • Check and repair sprinkler heads for poor coverage, if you see dry or dead areas in the lawn.

Veggies and Herbs

  • Continue transplanting warm-season crops like tomatoes, peppers, and eggplant. Shorter-season tomatoes need at least 55 to 65 days to grow, flower, and fruit, so get everything planted the first weekend of June.
  • Keep lettuce and spinach harvested. Cool-season plants will soon begin to bolt and lose their flavor and texture.
  • Plant basil seeds now and keep the bed or container evenly moist during germination. Continue to plant seeds every three weeks during the Summer.

Annuals and Perennials

  • Pinch off flowers to maintain the best flavor. Be sure to harvest the leaves all summer, especially younger leaves.
  • Keep plants deadheaded unless you’re saving seed heads to feed birds, or allowing rose hips to add color in fall.

  • Divide spring-blooming perennials and replant in other parts of the garden. Divide in the cool of the morning or evening and water well after planting.
  • Pinch back chrysanthemums weekly until the Fourth of July to keep the plant from blooming too early.
  • Fertilize hybrid tea and grandiflora roses every week with a balanced fertilizer or a specially formulated rose food.
  • Cut off spent flowers of both annuals and perennials all season for continued bloom. Many perennials have just one blooming period, but the plant will look tidier if deadheaded.


  • Thin tree fruits for larger and sweeter fruit and to reduce limb damage. Apples: thin to 6-8 inches between fruit; peaches: 6-10 inches; apricots and plums: 2-4 inches. Thin by hand or use a pole.
  • Protect ripening, June-bearing strawberries from birds and squirrels with protective 1/4- to-1/2-inch mesh netting. Stake well to prevent birds from getting underneath and injuring themselves.
  • Birds will know when your cherries are ripe before you do, so use care if using netting.


  • A sticky substance on leaves, pavement, or ants climbing trees is a sign of aphids.
  • Watch for signs of spider mites on ornamental evergreens such as spruce and arborvitae. As with aphids, try neem, pyrethrins or spinosad.

Adapted from: https://extras.denverpost.com/graphicsdept/gardencolorado/calendar/gardencoloradocalendar.html

June Sale

15% Off Fruit Trees and Baskets

  • New Castle Gardens

    6501 CR 214
    New Castle, CO 81647
    Open: Mon-Fri 9-5, Sat & Sun 10-3
    Masks Required. Only 4 People Inside At A Time.

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  • Seeds

    Due to increased order volume, Botanical Interests is not receiving new orders until 4/15/2020.

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