Acorn Squash

Acorn squash requires regular moisture, allowing the top inch (2.54 cm) of soil to dry out before repeating watering. For best production, provide one inch (2.54 cm) of water per week either through rainfall or irrigation. Water the base of the plants rather than the foliage to prevent disease.

Acorn squash prefer to receive full sun, though they can tolerate some shade. The plant is best grown in an area that sees at least 6 hours of direct sunlight per day to reach its full flavor and size. Foliage no more than 16 inches (41 cm) should be provided as the squash can become top heavy and require support.

Acorn squash can handle moderate fluctuations in temperature and will thrive in an optimal range of 60-85oF (15-30oC). It will grow poorly at temperatures below 50F (10 C) and maturity can be affected at temperatures above 90oF (32oC).

Acorn squash prefers a moderately humid environment and can become prone to fungal diseases if the humidity is too low. Planting in containers near a shady area can help retain moisture around the plant. Regular misting can also help raise the humidity in particularly dry climates.

Acorn squash prefers a well-draining, fertile soil with a pH of 6.0-6.8. If the soil is too dry, water deeply until the top six inches (15 cm) of soil are moist. If the soil is too wet, compost or peat can be added to help improve drainage.

Acorn squash will benefit from regular fertilization through the growing season. A 5-10-5 fertilizer is recommended or an organic fertilizer such as aged manure or compost. Fertilize at least once a month during the summer and discontinue fertilizing in late summer.

Squash vine borers, cucumber beetles, aphids, and squash bugs can all prove to be a major problem for acorn squash plants. Inspecting plants regularly and taking early action is necessary to prevent infestations. Keeping the garden clean and free of weeds and debris can help curb the presence of pests. Handpicking pests and applying neem oil to the foliage is effective for smaller infestations. For larger infestations, insecticidal sprays can be used according to label directions.

Acorn squash should not require repotting as long as it is planted in a container with enough room for the roots to spread out. Containers that are too small can cause the roots to become root-bound, making them difficult to repot. If repotting is necessary, it should be done at the start of the season.

Pruning is not necessary for Acorn squash. Excess foliage may be removed from the base of the plant to help promote air flow and prevent disease.

Mulching around Acorn squash plants is beneficial for keeping the soil moist and preventing weeds. Organic mulch such as grass clippings and straw can be used to maintain consistent moisture in the soil. If using inorganic mulch, ensure that the material does not become too hot and scorch the foliage.

In cooler climates, Acorn squash can be grown from seed in spring. Prepare the soil by adding a light layer of compost and dig small holes for planting. Plant the seeds one inch (2.54 cm) deep and space them 12-24 inches (30-61 cm) apart. Provide a trellis or other form of support for the plants. In milder climates, seeds can be planted in summer for a fall harvest.

The vines of Acorn squash tend to be long and can require support. A trellis system can be used to help keep the plant upright and off the ground. For container-grown plants, the stems can be securely tied to the side of the pot to encourage upright growth.

Acorn squash does not require a cold rest period. For areas that have mild winters, planted squash can overwinter and produce a vegetable the following year, provided the temperature remains between 20-50oF (-6- 10oC).

Acorn squash is a non-toxic plant and is safe for pets and people.