Planning tool

Garden Watering Planner

Start from the default 4 x 8 ft raised-bed water target, then adjust with weekly rain, bed area, soil texture, mulch, crop stage, and catalog water-need notes.

Planning tool

Current watering target

About 20 gallons/week

4 x 8 ft bed after 0 in rain: water about 20 gallons this week, then recheck root-zone moisture before repeating.

Bed footprint32 sq ft
Weekly baseline20 gal
Rain credit0 gal
Water this week20 gal

Inputs

Default 4 x 8 ft bed target
About 20 gallons per week for the default 4 x 8 ft bed at the one-inch weekly vegetable-garden target.
No rain gauge presets
Use No rain this week, Light rain under 1/2 in, Soaking rain near 1 in, or Heavy rain 2 in+ before asking users for exact rainfall.
Rainfall and manual adjustment
Subtract rain-gauge totals first, then resize the gallons target only when the bed differs from the default preset.
Catalog water needs
Each seed entry includes a water note so steady-moisture crops, shallow-rooted greens, deep-water vines, and lower-water established plants can be separated.
Soil and mulch context
Sandy soil, clay soil, organic matter, mulch, and raised-bed drying change how often water must be applied.
Crop stage
Seed germination, transplant establishment, flowering, fruiting, ear fill, and harvest quality stages should be checked before skipping irrigation.

What it returns

Planning guidance

Weekly baseline
One inch per week is the baseline vegetable-garden target; UMN converts that to 62 gallons per 100 square feet before subtracting weekly rainfall.
Soil check
Water when the soil is dry two inches below the surface, then adjust frequency because sandy soil dries faster and mulched soil holds moisture longer.
Application method
Use drip, soaker, trickle, or low-flow hose watering near the base of plants; roots need water more than leaves do.
Shallow watering caution
Avoid shallow, frequent watering except for fast-growing salad greens because it encourages shallow roots and drought injury.
Crop timing
Water is most needed during the first few weeks of plant development, immediately after transplanting, and during development of edible plant parts.
Critical crop stages
Clemson highlights critical stages such as bean flowering, corn silking and ear development, cucurbit flowering and fruiting, and eggplant, pepper, and tomato flowering through harvest.
Overwatering boundary
Too much water can saturate roots, leach nutrients, increase disease pressure, and reduce flavor in crops such as melons and watermelons.
Catalog boundary
The candidate lists come from catalog water text, while the source notes are vegetable-garden irrigation guidance for interpreting those entries.

Steady-moisture candidates

Lower-water-after-establishment candidates

Supporting planning paths

Source basis