The Gentry hybrid summer squash is a compact semi-crookneck squash with high yields. This squash variety is suitable for growing in smaller garden spaces and can withstand hot summer temperatures. This squash plant produces 5 ½- to 6-inch-long fruits that mature in about 43 days. You should plant your Gentry summer squash seeds in your garden at least three weeks after the last spring frost, when the soil is at least 60 degrees Fahrenheit.
Prepare a planting site that is large enough for the number of summer squashes you want to plant, spaced about 8 to 10 inches apart in rows that are 3 feet apart. Select a site that receives full sunlight and has rich soil.
Loosen the soil to a depth of 6 to 12 inches using a pitchfork or rototiller. Work into the soil some well-rotted organic compost.
Erect a trellis if desired by inserting 4-foot-tall wooden stakes next to each plant site and running two to three rows of evenly spaced wires along the stakes.
Plant two summer squash seeds 2 to 3 inches deep at each plant site. Water the soil generously and evenly to moisten it down to the seed level, but don't water log the soil or allow the water to pool without draining.
Thin out the seedlings after they begin to sprout and grow to about 3 inches tall. Select the weaker of the two seedlings and remove it by cutting the seedling at the soil level with scissors.
Feed your Gentry summer squash every three weeks with a 5-10-10 NPK (Nitrogen-Phosphorous-Potassium) fertilizer, according to the dosage instructions on the package. Water the plants right after applying the fertilizer.
Water your Gentry summer squash plants two or three times every week, or daily during dry spells or droughts. Water the plants deeply and evenly to ensure adequate water distribution down to the plants' extensive root systems.