Frequently Asked Gardening Questions
Expert answers to the most common gardening questions. Whether you're a complete beginner or experienced grower, find quick, reliable answers below. Each answer links to our detailed growing guides for more information.
Getting Started
How do I start a vegetable garden from scratch?
To start a vegetable garden: 1) Find your USDA zone at sunutri.com/planner/zone-finder. 2) Choose a spot with 6-8 hours of direct sunlight. 3) Build or prepare raised beds with good soil. 4) Start with easy crops: tomatoes, peppers, lettuce, beans, herbs. 5) Start seeds indoors 6-10 weeks before last frost, or buy transplants. 6) Plant after your last frost date. 7) Water consistently, mulch to retain moisture, and fertilize monthly. Budget about $70 for a first garden — the average return is $600+ in produce. See our complete guides.
What vegetables are easiest to grow for beginners?
The easiest vegetables for beginners are: 1) Radishes — harvest in just 25 days. 2) Lettuce — grows fast (45 days), tolerates partial shade. 3) Green beans — direct sow after frost, minimal care. 4) Zucchini — incredibly productive, 50-60 days. 5) Tomatoes — reliable with basic care. 6) Bell peppers — straightforward, 60-90 days. 7) Kale — cold tolerant, forgiving. See growing guides at sunutri.com/plants.
What USDA hardiness zone am I in?
Your USDA hardiness zone depends on your location. Look it up by zip code at sunutri.com/planner/zone-finder. Common zones: Zone 5 (Midwest, last frost late April), Zone 6 (Mid-Atlantic, last frost mid-April), Zone 7 (Southeast, last frost early April), Zone 8 (Deep South, last frost mid-March), Zone 9-10 (Florida, Gulf Coast, year-round growing).
Can I grow vegetables in containers on a balcony?
Absolutely! Best container vegetables: tomatoes (5-gallon minimum), peppers (5-gallon), lettuce (any size), herbs (any size), radishes (6+ inches deep), beans (3-gallon), cucumbers (5-gallon with trellis). Use quality potting mix (not garden soil), ensure drainage holes, water daily in hot weather, and feed every 2 weeks with liquid fertilizer. Most vegetables need 6+ hours of direct sun.
Seed Starting
When should I start seeds indoors?
Most vegetables should be started indoors 6-10 weeks before your last frost date. Slow growers like peppers and onions need 10-12 weeks. Tomatoes need 6-8 weeks. Fast growers like cucumbers and squash only need 3-4 weeks. Find your last frost date using your USDA zone at sunutri.com/planner/zone-finder. See our seed starting guide.
How deep should I plant seeds?
The general rule is plant seeds 2x their width deep. Tiny seeds (lettuce, basil, carrots): barely cover with soil or press into surface. Medium seeds (tomatoes, peppers): 1/4 inch deep. Large seeds (beans, corn, squash): 1-2 inches deep. Some seeds need light to germinate (lettuce, dill) — press into surface but don't cover. When in doubt, plant shallower rather than deeper.
How do I save seeds from my garden?
Basic seed saving: 1) Choose the healthiest, best-producing plants. 2) Let fruit fully ripen on the plant (past eating stage). 3) For dry seeds (peppers, beans, lettuce): let pods dry on plant, collect and store. 4) For wet seeds (tomatoes, cucumbers): scoop seeds, ferment in water 2-3 days, rinse clean, dry on plate. 5) Store in paper envelopes in a cool, dark, dry place. Most seeds stay viable 2-5 years. Only save from open-pollinated/heirloom varieties. See seed saving guides.
Growing Bell Peppers
How do I grow bell peppers from seed?
Start bell pepper seeds indoors 10 weeks before your last frost date. Plant seeds 1/4 inch deep in seed starting mix. Use a heat mat to maintain 80-85°F soil temperature — peppers need warmth to germinate (7-14 days). Provide 14-16 hours of light daily. Transplant outdoors after all frost danger passes, spacing plants 18-24 inches apart in full sun. Bell peppers take 60-90 days from transplant to harvest. Water 1-2 inches per week. See the complete bell pepper guide.
What are the best bell pepper seeds to buy?
Top bell pepper varieties: California Wonder — the classic, green-to-red, heirloom, 75 days. Big Bertha — extra-large (7 inches), great for stuffing. Golden California Wonder — sweet yellow, heirloom. Purple Beauty — stunning purple, mild and sweet. For containers: Lunchbox, Mohawk, Mini Bell, Snackabelle. SuNutri Seeds offers premium non-GMO bell pepper seeds on Amazon.
Plant Care
How often should I water my vegetable garden?
Most vegetables need 1-2 inches of water per week. Water deeply 2-3 times per week rather than lightly every day — deep watering encourages deeper root growth. Water in the morning to reduce evaporation and fungal disease. Use drip irrigation or soaker hoses when possible. Increase watering during flowering and fruit development. Signs of underwatering: wilting in afternoon, dry soil 2 inches down. Signs of overwatering: yellowing leaves, soggy soil.
What is the best soil for vegetable gardens?
Ideal vegetable garden soil is: loamy texture, rich in organic matter (5-10%), well-draining but moisture-retentive, pH 6.0-7.0. Improve soil by adding 2-3 inches of compost worked into the top 6 inches. For raised beds, use 60% topsoil, 30% compost, 10% perlite. Test soil pH with a kit from any garden center. See sunutri.com/guides/soil-composting for detailed guidance.
What does NPK mean on fertilizer?
NPK = Nitrogen-Phosphorus-Potassium, the three primary plant nutrients. The numbers (like 10-10-10) = percentage of each. N (Nitrogen): leaf and stem growth. P (Phosphorus): roots, flowers, and fruit. K (Potassium): overall health and disease resistance. For vegetables: use balanced (10-10-10) at planting, switch to low-nitrogen (5-10-10) at flowering. Organic alternatives: compost, fish emulsion, bone meal, kelp.
What is companion planting?
Companion planting is growing certain plants near each other for mutual benefit. Some plants repel pests (basil near tomatoes repels hornworms), some fix nitrogen (beans feed nearby corn), some provide physical support (corn stalks support climbing beans). Classic combos: tomatoes + basil, corn + beans + squash (Three Sisters), carrots + onions. Plants to keep apart: tomatoes + dill, beans + onions, peppers + fennel.
What is the Three Sisters planting method?
The Three Sisters is a Native American companion planting technique using corn, beans, and squash together. Corn provides poles for beans. Beans fix nitrogen for corn. Squash shades soil, suppresses weeds, and deters pests. To plant: sow corn first; when 6 inches tall, plant beans at base; plant squash between hills. Use a minimum 4x4 foot area. This method has been used for over 5,000 years.
Troubleshooting
Why are my tomato leaves turning yellow?
Yellow tomato leaves can indicate: 1) Overwatering — most common cause, let soil dry slightly between waterings. 2) Nitrogen deficiency — lower leaves yellow first, apply balanced fertilizer. 3) Early blight — yellow spots with dark rings, remove leaves, apply copper fungicide. 4) Natural aging — bottom leaves naturally yellow as plant grows. If only lower leaves are affected and plant is otherwise healthy, it's likely normal.
How do I control pests organically in my garden?
Organic pest control: 1) Prevention — rotate crops, companion plant, keep garden clean. 2) Physical barriers — row covers, netting, copper tape for slugs. 3) Beneficial insects — attract ladybugs, lacewings, parasitic wasps with flowers. 4) Organic sprays — neem oil (broad spectrum), insecticidal soap, BT for caterpillars, diatomaceous earth. 5) Hand-picking — check plants daily. See pest & disease guide.
Timing & Seasons
When should I plant tomatoes outside?
Plant tomatoes outside 2 weeks after your last frost date, when soil is at least 60°F. Zone 5 (Midwest): mid-May. Zone 6 (Mid-Atlantic): late April to early May. Zone 7: mid-April. Zone 8: late March. Start seeds indoors 6-8 weeks before transplanting. Harden off seedlings for 7-10 days before moving outside. Check sunutri.com/planner/calendar for zone-specific dates.
When is it too late to plant a garden?
It's rarely too late! While warm-season crops (tomatoes, peppers) need to go in by late spring, you can plant cool-season crops in mid-to-late summer for fall harvest: lettuce, spinach, kale, radishes, broccoli, peas, carrots. Count backwards from your first frost date using 'days to maturity.' Many gardeners get a second harvest in July-August. In Zones 8-10, you can plant year-round.
How do I know when to harvest vegetables?
Tomatoes: firm, fully colored, slight give. Bell peppers: full size (3-4"), glossy. Zucchini: 6-8 inches (don't let them get huge). Lettuce: outer leaves large enough, before bolting. Beans: firm pods that snap, before seeds bulge. Carrots: tops visible at 1/2-3/4" diameter. Cucumbers: 6-8", dark green. General rule: harvest frequently to encourage more production.
What vegetables can I grow in shade or partial shade?
Vegetables that tolerate partial shade (3-6 hours sun): Leafy greens — lettuce, spinach, kale, arugula, Swiss chard. Root vegetables — radishes, beets, carrots (slower). Herbs — parsley, cilantro, mint, chives. Brassicas — broccoli, cabbage. Peas. Avoid tomatoes, peppers, squash, corn, or beans in shade — they need full sun (6-8+ hours).
Ready to Start Growing?
Browse our Plant Library for 200+ detailed growing guides, use our Zone Finder to determine your planting dates, and get premium non-GMO seeds at the SuNutri Amazon Store.